David Ding
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Digg
Digg is a user driven social content website
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Facebook
Facebook is an online social networking company. They provide a number applications, messaging and chatting features, and picture and video space for users to stay connected worldwide.
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Gumball Capital
A start-up nonprofit that engages students with entrepreneurship for social good through microfinance.
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meebo
Mountain View-based Meebo is a Sequoia-backed, web-based instant messaging company
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Qik
A mobile application that allows you to stream live video from your cell phone and broadcast your life to the world LIVE!
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Twitter
Twitter is a service for friends, family, and co–workers to communicate and stay connected through the exchange of quick, frequent answers to one simple question: What are you doing?
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YOBO
Yobo connects artists and fans in a social network for anything related to music