30 Under 30 2011: Where Are They Now?

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Naveen Selvadurai, Foursquare, 2010

Co-founders Naveen Selvadurai and Dennis Crowley are still manning the expansion of their wildly popular geo-social site and app, Foursquare. Selvaduari recently attended the Webby Awards in New York City, at which Foursquare took the award for Best Mobile Social Networking. Now boasting 8 million users (up from 2 million in 2010), the company has its sights on local advertising markets—a virtually untapped market. "I think we're in a position to do something revolutionary for local advertising," Crowley recently told Reuters. According to the company's website, Foursquare currently employs 60 people between its New York and San Francisco offices. Read more.