The old model of government was aptly named "vending machine government" by Donald Ketti. "We pay our taxes; we get back services. And when we don't get what we expect, our 'participation' is limited to protest--essentially, shaking the vending machine," writes Tim O'Reilly in the latest O'Reilly Insights on Forbes.com. Gov 2.0 is an alternate method, in which "government is a convener and an enabler--ultimately, it is a vehicle for coordinating the collective action of citizens." The question is, how does this happen? Learn more about the O'Reilly/TechWeb Gov2.0 Expo, September 8, 2009, in Washington, DC.