One of my favorite (and most politically and socially aware) bloggers, Danielle at Modern Musings, is doing a blogathon for a good cause this weekend.
She's supporting Resist, an organization that funds small community-based projects. If you listen to her podcast, you can hear her talk about it. If you have a few extra bucks, you might pledge. If you're short of cash, maybe you can pull the above banner and put a link in your blog.
You go, girl!