MySpace, Facebook and Other Social Networking Sites: Hot Today, Gone Tomorrow?

Popular social networking sites, including MySpace and Facebook, are changing the human fabric of the Internet and have the potential to pay off big for investors, but -- given their youthful user base -- they are unusually vulnerable to the next 'new new' thing. As quickly as users flock to one trendy Internet site, they can just as quickly move on to another, with no advance warning, according to Wharton faculty and Internet analysts.

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