Transition Towns are communities of people throughout the world dedicated to responding to the challenges and opportunities of peak oil and climate change.  The main aim is to raise awareness of sustainable living and build local resilience in the near future through a variety of projects.  Cities recognized as official Transition Towns in the U.S. include Portland ME, Davis CA, Ketchum ID, Berea KT, Ashland OR and 8 more.   You can read more about Transition Towns on their webpage here.