I headed online to start researching (I was looking for a used car) but was overwhelmed by an avalanche of information. Everyone seemed to have something to say about cars, whether in blogs, community forums, editorial reviews, Kelley Blue Book values, Carfax reports or local dealer sites. As I discussed my findings with friends and family, more people than not were surprised to hear about the variety of research and price comparisons available online.

This week’s column is an overview of sites that may help you or someone you know browse for a new or used car on the Web. I used sites ranging from trusted resources like ConsumerReports.org to search engine tools like Yahoo Autos. This column can’t possibly mention every car-searching resource on the Web; rather, it’s just a taste of what’s available.

Edmunds.com and ConsumerReports.org both feature informative data on a number of new and used vehicles. Edmunds is a free site specifically geared toward cars, including an online magazine for enthusiasts called Inside Line and a Web forum for discussions about automobiles called CarSpace. I used various tools on Edmunds.com, including one that estimates the true cost to own a specific car over time. I especially enjoyed reading an article titled “Confessions of a Car Salesman,” which proved uncanny in predicting a range of tricks and techniques the salespeople used when I first visited a car dealership.

Edmunds offers a four-step pricing system, which includes getting quotes from dealers, and a payment calculator, which estimates monthly payments. Edmunds teams up with AutoTrader.com to help perform searches for certified pre-owned or used cars online.

Consumer Reports covers products as well as cars but keeps much of its most useful data behind a Web-site subscription, which costs $26 annually or $5.95 monthly (magazine subscribers can pay a discounted price of $19 a year). You need this subscription to access CR’s respected ratings and certain sections of its Web forums. These ratings were helpful to me, as they assessed numerous aspects of specific car models, including trouble spots by year, performance, safety and fuel economy.

CR also offers valuable lists such as “All Recommended Cars,” “Best and Worst Used Cars” and “Reliable Used Cars by Price.” A car-buying calculator is an asset to this site that helps you decide whether it would be smarter to buy or lease a vehicle.

Google, Yahoo and AOL all present special search-results pages when you search for a specific car for sale, using drop-down menus and various ways to sort results. Google Base for automobiles, found by selecting “Vehicles” from www.google.com/base, is a list of data submitted to Google. Drop-down menus help broaden or narrow results by sorting the data according to certain attributes, such as make or price. Vehicle-search results can be viewed in one of three formats: List View, Table View or Map View — an illustration of each car’s location in relationship to a Zip Code. I found Table View most useful because it organized data in smart, spreadsheet-like displays so I could quickly skim through columns listing price, color, amenities and mileage.

But not all car searches within Google Base returned the same drop-down-menu options for sorting. In a few instances, I couldn’t sort my search results by model year. Google Base does show the date on which each car was listed.

Yahoo Autos, found at www.autos.yahoo.com, teamed up with Cars.com to offer richer content, including a Car Finder feature that helps people narrow down what type of new car they might like according to price, driving style and fuel (type and economy). Yahoo even tries to answer car questions with its Yahoo Answers Q&A tool, which lets people submit questions. I found user reviews on this site, as well as expert reviews provided by NewCarTestDrive.com, an auto-review site.

The used-car section in Yahoo Autos reminded me of Google with its drop-down menus and results that displayed in list or map views. List view shows plenty of information in one glance, including an image of the car for sale and the number of additional available photos. From this list, users can link directly to view or order Carfax reports or email the dealer, saving time wasted on excess mouse clicks and browsing.

AOL Autos, found at http://autos.aol.com, does a nice job of integrating Web 2.0 features such as pop-up menus that appear within a page rather than in an entirely new Web page. Vehicle-search results are found by entering a few criteria for a new or used car, and used-car results can be further narrowed by adding or subtracting desired specifics listed on the far left of the screen. Some specs include model type, engine, year or extras like heated seats or a sunroof.

This site can also condense numerous used-car listings into one graph that illustrates car prices in relationship to mileage or year. Selecting any point on the graph reveals a short description of a vehicle’s location, price and mileage. For new cars, AOL Autos offers lengthy expert reviews from NewCarTestDrive.com, as well as user reviews.

Both Yahoo Autos and AOL Autos walk users through steps to get price quotes from dealers for new cars.

Carfax.com provides car-history reports using vehicle-identification numbers, or VINs. For a $30 fee, used-car buyers can use Carfax.com for 30 days. This report shows a vehicle’s history such as if it was a rental or not, how many different owners it had, how long each owner possessed the vehicle and where it came from. Tips pop up within these reports, including one that warned me about “curbstoning,” a term that describes an individual without a dealer’s license looking to sell a number of cars by posing as a private seller.

As can be expected, many newspaper Web sites offer automobile sections that display digitized classified ads, so be sure to check your local paper’s Web site.

At the end of the day, test-driving a car will be a true test as to whether or not you like it — no matter how much research you’ve done online. But knowing your stuff before you visit a dealership can save money and time.

• Email mossbergsolution@wsj.com.

This week I tested Jaman.com, a Web site that gives users the chance to download independent and international movies from the Web directly to their computers. It also serves as a social networking forum where movie watchers can read one another’s reviews, write their own comments that run alongside the film, and join groups with people who have similar tastes in movies. Jaman (pronounced jah-mahn), has 1,800 titles. It charges $1.99 for rentals, which can be watched for up to seven days, and $4.99 to buy a movie outright.

Jaman.com’s home page (above) suggests movies for downloading, such as ‘Inside Iraq: The Untold Stories,’ and comments can be seen in a side panel while the film is being watched (below).

Jaman isn’t alone in the online movie downloading business, and its competitors boast bigger selections. Just this year Netflix Inc., known for popularizing DVD rentals through the mail, started offering its own movie downloads. So as to encourage this new method, Netflix builds movie-watching hours into its monthly plans, which range from $5 to $24 and include a certain number of hours during which downloaded movies can be watched. Of the 85,000 DVD titles available on Netflix.com, 4,000 titles can be downloaded.

Blockbuster Inc., which followed Netflix into the DVD mailing business, showed an interest in the online downloading method last month when it acquired Movielink LLC, a movie downloading service previously owned by Hollywood’s major studios.

And Apple Inc., which began selling films for $10 to $15 a year ago on its iTunes Store, offers over 500 movies. Amazon is in the game, too, as is Microsoft.

But Jaman hopes its niche films and viewer-comments system will set it apart.

I took a close look at Jaman, downloading movies from various countries, posting comments about them on the Jaman.com site and reading what others thought of the films. I used a Mac and two Windows computers running Microsoft’s Vista and XP operating systems, and tried Jaman on all three major Web browsers. The site itself can feel a bit overwhelming, jumbling a lot of text together on pages that lack a clean central place where every element comes together. More than once, films blacked out in midplay, and Jaman’s community aspect didn’t seem as well-organized or integrated as I had hoped.

Jaman has another major downside: It forces every user to designate some of his or her bandwidth to distribute movies for the company, using a peer-to-peer program. Community network setups like this aren’t unheard of; Skype and many others use such setups. But these other companies are often free, while Jaman is charging users for movies while simultaneously using their bandwidth to reduce strain on its own servers. Participation in the peer-to-peer network is required while downloading a movie but can be stopped at all other times. Even so, this is a real chink in Jaman’s armor.

Jaman.com drops users into a site where five movies are showcased, showing their trailers one after another. Other titles can be searched according to region, categories and genres, top movies or films made and submitted by users. I skimmed through flicks from Asia, South Asia, the Middle East, North America, Europe and Latin America. A useful feature displayed details about a movie when I held my cursor over its title including a description, the movie’s Jaman rating (out of five stars), duration and genre. Jaman doesn’t sort movies by duration, which would have saved me time while I was looking for a short film to download for a cross-country flight.

I was surprised to notice that none of the movies prominently displayed Motion Picture Association of America ratings. Jaman explained that these data are buried within a sub-menu of details about a movie, but many films didn’t list ratings — even those with MPAA ratings.

Three rentals come included with each Jaman membership, which was free and quickly obtained in my experience, though a friend of mine had trouble when he didn’t receive Jaman’s email verification with two different addresses. I downloaded and watched movies from Mexico, the United Kingdom and North America, and watched a 21-minute Japanese short film that streamed directly from the site and didn’t require downloading. Community comments and reviews helped me pick movies, especially Jaman’s own one-line summary that it calls “Our Take.”

To download and watch movies from Jaman, users must first download the Jaman player. But this player doesn’t work with the Web site as smoothly as it should. For example, after reading various reviews of movies, I found a comedy from the U.K. called “Nobody The Great,” and opted to rent it. I downloaded the Jaman player but it didn’t recognize that I already signed in and chose the movie to rent on the Web site. I started over by signing in, finding the film and choosing the rental option, this time using the player.

“Nobody The Great” turned out to be an amusing story about two English guys who find supposed terrorists in their home but are more concerned about not ruining an evening planned with two women. The film is only 47 minutes long and 753 megabytes, but it took about two hours to download using a broadband connection. The most maddening thing about downloading the movie using Jaman was that the estimated time until completion kept changing dramatically — one moment it read 224 minutes, the next 69 minutes, then 22, 40 and 17. Other downloads followed this same wacky pattern, some worse than others.

After watching a movie, I was prompted by Jaman to rate the movie or to write a review about it. Jaman uses email messages with links to join discussions with others who saw the same movie. These discussions groups are more like blogs, with each person’s comment listed as a different post. Some of the movies that I watched hadn’t been reviewed in a while, so I wasn’t as inspired to add my comments as I might have been if there was a live discussion taking place.

This staleness was experienced again in one of my favorite Jaman features: comments that run on-screen during a film if you’re online. These can be hidden so as not to distract the viewer, but I found some of the comments really interesting. For example, while watching a subtitled Mexican movie from 1995 called “El Callejon De Los Milagros” starring Salma Hayek, comments appeared roughly every 10 minutes from a user named Cinequest. I later learned that Cinequest represented the Northern California motion picture institute of the same name and that the comments left weren’t live but were stuck to the movie so that anyone watching it could see them. I was free to leave my own comments, but I didn’t have quite as much to say about camera angles as Cinequest. The film director’s comments can also be seen here.

Jaman says that its road map includes plans for live comments, which would encourage more interaction with others as if watching a movie with friends.

Though I didn’t spend a majority of my time there, Jaman’s Community section seemed a little weak. Groups like “Bollywood 101″ and “Cult Movies” had members and comments left by these members, but still seemed somewhat disconnected from films. For example, preview clips of certain movies were posted to share with the group, but most of the comments made by the group weren’t related to the clips.

Jaman introduced me to new films that I wouldn’t otherwise have found. But its peer-to-peer system and its overall lack of real-time comments were frustrating. I’d also like to see Jaman reorganize the look of its site so it doesn’t feel so cluttered.

Edited by Walter S. Mossberg

Email mossbergsolution@wsj.com