The cutting edge of open data and collaborative government has always been at the city level, starting with pioneering work by Washington DC CTO Vivek Kundra several years ago. Now bigger cities like New York, San Francisco and Boston are joining the movement, but no big city may be more poised to do more innovative work in this field than the city of broad shoulders. On this call, we dig in with John Tolva, CTO of Chicago and former head of IBM's Citizenship and Technology program, to learn how big data and lots of networking can enable a reinvention of urban life.

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John Tolva is the City of Chicago's Chief Technology Officer, and the former Senior Program Manager for Cultural Strategy and Programs at IBM. He holds a Masters in Information Design and Technology from the Georgia Institute of Technology and a Masters in English Literature from Washington University. In 2006, Crain recognized him as one of the "40 under 40." Since 2004, He's been blogging about technology, innovation, and Chicago at www.ascentstage.com.