I love Posts Like This ReadWriteWeb picked up on The University of Washington's Living Voters Guide, a site dedicated educating voters on issues and referendums in Washington state.
"However, it might not be entirely accurate to call the librarians on the site "fact-checkers." They are more like on-call information finders. The system set in place at the Living Voters Guide is guided by the people that use it. They ask for topics brought up by others to be fact-checked and the librarians respond with direct research from a reliable source. Fact-checkers do this, too, but can sometimes be guided by entities that have a vested interest in their fact-finding results. "