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New social networks Pheed and CyPop, and a revamped Myspace, try to challenge Facebook for market share. Read »
Viddy, a video-sharing service, now boasts 26 million users and signing 500,000 users a day post, but did it get a bump from Mark Zuckerberg? Read »
Facebook CEO Mark Zuckerberg joined a video-sharing service, dubbed the "new Instagram," but why isn't he sharing his videos on Facebook? Read »