I don't know why I have not blogged about this site, Worldchanging, before - it is truly outstanding, and really functions as a group weblog (also received all kinds of awards). The executive editor is Alex Steffen who has spent his carreer exploring ways to build a better future. It deals with sustainable living, and the impact we make or could make. It pushes us to change our thinking. The site covers stuff, shelter, cities, community, business, politics and the planet. It is an incredible on-going conversation.