This week at Cafe we'll be discussing Bill Bishop's The Big Sort: Why The Clustering of Like-Minded America is Tearing Us Apart. It's a timely topic, as the conventions loom near, and we've got a great-- and widely differing-- group. Joining us: Rich Florida, Author of The Rise of the Creative Class, blogger Bob Carlton, Bill Greener, Program Coordinator for the RNC, Ian McDonald, PhD candidate at Duke University, Saskia Sassen of Columbia University, Walker Smith, President of Yankelovich Partners, and Matthew Yglesias of The Atlantic (and former TPMer!). Bill's first post will be up in a few minutes. Should be an exciting week.