“Congresspedia, the “citizen’s encyclopedia on Congress” that anyone can edit. Congresspedia is a collaborative project of the Center for Media and Democracy and the Sunlight Foundation and is designed to shine more light on the workings of the U.S. Congress.”

This seems really cool, and I expect it to be more useful to me than their older sister site, SourceWatch (which documents information about all sorts of think tanks, private groups, and other organizations and figures which routinely dominate the public agenda). Congresspedia already has a solid base of useful material on each current member of Congress.