If you don't already read the WorldChanging blog, start now. It's an awesome, solutions-based journalism nonprofit that writes about, "tools, models and ideas for building a bright green future." They also have a book out, WorldChanging: A User's Guide for the 21st Century, a 537 page tome that is divided by topic: stuff, shelter, cities, community, business, politics and planet.
I've read up to page 360 (whew), and so far it is my favorite book of the year. It's the kind of book that makes your brain and heart go "ah" because the ideas are so incredible AND do-good, and I'm not saying that just because I write for a WorldChanging Local Blog.
I recently talked with WorldChanging's Executive Editor, Alex Steffen, for the NetSquared Podcast about how he thinks the social web can be used for social change. I'll have the transcript up here soon, but in the meantime, since you might have some free time this weekend to listen, here is the link to the interview on the NetSquared Podcast.