President Medvedev stopped by Twitter’s headquarters for a quick visit and his first tweet via @KremlinRussia. The president’s first tweet:“Hello! I’m on Twitter and it’s my first message.
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Yelp, Inc. is a Web 2.0 company that operates a social networking, user review, and local search web site of the same name. Over 25 million people access Yelp's website each month.