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"To say Evan Williams has had a stellar run at Twitter would be understating things tremendously, but he apparently couldn't take the pressure after watching The Social Network this weekend. All kidding aside, Mr. Williams has decided to step aside and let COO Dick Costolo take over as CEO, while he focuses entirely on \"product strategy.\" It's unclear what exactly Evan will be doing at his new post, nor why he decided to step away from the ultimate limelight, but then again, it's hard to sum up a corner office job description in just 140 characters."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2010/10/04/dick-costolo-named-new-twitter-ceo-evan-williams-to-focus-on-pr/>