From CEO for Cities:

Take a look at Pittsburgh’s Citiwiki that invites citizens to offer their own ideas to develop an intelligent, easy-to-use transportation system that works for people of every stripe?

The goal of the Wiki is to harness the considerable intellectual firepower of the Pittsburgh region’s thoughtful citizenry to help transform it into a world-class city, a leader in the best kind of urban living.

Also, lessons of neighborhood democracy.