WHAT'S INSIDE: SOCIAL NETWORKING

Most of us know that Internet communities and social networking sites are popular, but how do blogs, podcasts, wikis and companies like Digg and MySpace work? Learn more in the Social Networking section.

FEATURED: SOCIAL NETWORKING

FPO

A lot of people are passionate about their cars. But is there any place online -- some kind of social network -- where they can go to do a little showing off? CarDomain just might be the answer.

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Social networking is popular -- there's no doubt about it. And motorsports has plenty of fans, too. But is there a social network where race fans can go to discuss the sport they're so passionate about?

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Tagged is one of the most popular social networking sites in the United States, but it's also got a reputation as a spammer. Why is Tagged so controversial?

INTERNET: SOCIAL NETWORKING