I ran into this one in the comments section of a political blog - FactCheck.org (Annenberg Political Fact Check):
"We are a nonpartisan, nonprofit, 'consumer advocate' for voters that aims to reduce the level of deception and confusion in U.S. politics. We monitor the factual accuracy of what is said by major U.S. political players in the form of TV ads, debates, speeches, interviews, and news releases. Our goal is to apply the best practices of both journalism and scholarship, and to increase public knowledge and understanding.
"The Annenberg Political Fact Check is a project of the Annenberg Public Policy Center of the University of Pennsylvania. The APPC was established by publisher and philanthropist Walter Annenberg in 1994 to create a community of scholars within the University of Pennsylvania that would address public policy issues at the local, state, and federal levels.
"The APPC accepts NO funding from business corporations, labor unions, political parties, lobbying organizations or individuals. It is funded primarily by an endowment from the Annenberg Foundation."
Great stuff - it's like the Snopes of politics!