
Twitter CEO steps down

Twitter co-founder Evan Williams stepped down as CEO. In a post on the company blog, Williams said Twitter's COO Dick Costolo would take over as CEO effective immediately. Costolo, whose web content distribution company Feedburner was purchased by Google in 2007, has been at the forefront of efforts to begin monetizing Twitter since he joined the company last year. Williams said Twitter now employs around 300 people, up from 20 when he took over as CEO two years ago. Twitter co-founder Jack Dorsey is presently Twitter's chairman while the third founder, Biz Stone serves as creative director.
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