Social media stocks tumble on tepid Facebook IPO; Zynga, Yelp hit all-time lows

The powerful San Francisco-based Yelp has become an influencer of behavior, with everybody from plumbers to pediatricians living in fear of the wrath of the Yelpers. But when it comes to Yelp employees' dogs, however, landlord Wilson Meany Sullivan hasby Andrea Kramer 5/17/2012 9:14 AM Wall Street freshman Yelp Inc. (YELP - 21.60) was a fan favorite among eleventh-hour call buyers yesterday. During the course of the session, the online business-review concern saw close to 4200 calls change handsYelp is going full steam ahead

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