Check out FactCheck.org (and add it to any politics/elections resources lists you have). I have heard reference to this site before, but this is the first time I've actually used it–and I'm impressed. Devoted to actually checking all the facts that politicians spout off in their speeches and addresses, it's pathetic how many mistakes (knowing or not) are made. The site, a project of the Annenberg Public Policy Center at U Penn, highlight the mistakes that are made, often linking to the primary documents (video, audio, text) in which the mistakes were made. Nice work!