Internet And Technology Leaders Address Web 2.0 Summit 2011

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Foursquare co-founder Dennis Crowley speaks during the 2011 Web 2.0... News PhotoBusiness,California,Corporate Business,Dennis Crowley,Finance,Founder,Horizontal,San Francisco - California,Talking,Technology,The Internet,USAPhotographer Collection: Getty Images News 2011 Getty ImagesSAN FRANCISCO, CA - OCTOBER 18: Foursquare co-founder Dennis Crowley speaks during the 2011 Web 2.0 Summit on October 18, 2011 in San Francisco, California. The 2011 Web 2.0 Summit features keynote addresses by Internet and Technology leaders and runs through Wednesday. (Photo by Justin Sullivan/Getty Images)