Twitter Co-Founders Biz Stone And Ev Williams Address Developers Conference

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Attendees mingle during a break at the first annual Chirp, Twitter... News PhotoAnnual Event,Business,California,Corporate Business,Finance,Horizontal,Internet,San Francisco - California,Social Gathering,Social Networking,Technology,Twitter,USAPhotographer Collection: Getty Images News 2010 Getty ImagesSAN FRANCISCO - APRIL 14: Attendees mingle during a break at the first annual Chirp, Twitter Developer's Conference April 14, 2010 in San Francisco, California. Chirp, the Twitter Devloper's Conference is a two day event for developers who work with the popular social networking service. (Photo by Justin Sullivan/Getty Images)