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Zuckerman opens up by saying "the last 5 years of social networking have been about getting people signed up, but now, most people see social networks as a tool to stay connected every day."
Facebook hit a new milestone last week: In a single day, half a billion people used it..
He introduces Timeline which will be Facebook's updated profile. It has 3 pieces: All your stories, all your apps, and a new way to express who you are.