They've got some great coverage of misinformation in the climate change discussion – you can check out all their coverage of the topic at http://mediamatters.org/issues_topics/global_warming .
From their site:
Media Matters works daily to notify activists, journalists, pundits, and the general public about instances of misinformation, providing them with the resources to rebut false claims and to take direct action against offending media institutions.Definitely the kind of allies we need in our work to keep misleading PR spin out of the climate change debate. It is, after all, the media who chooses whether or not to publish the views of the agenda-driven climate change skeptics. Check them out!