RealClimate has posted a compendium of links to resources on the climate change issue. They tout it as a "one stop link for resources" and it begins to live up to that billing: Start Here
RealClimate describes itself as "a commentary site on climate science by working climate scientists for the interested public and journalists. We aim to provide a quick response to developing stories and provide the context sometimes missing in mainstream commentary. The discussion here is restricted to scientific topics and will not get involved in any political or economic implications of the science."
Contributors include NASA climate modeler Gavin Schmidt and Michael "Hockey Stick" Mann, along with a half-dozen or so others of some renown.
The compendium is divided into sections from noobs and neophytes to those who consider themselves "informed, but in need of serious discussion of common contrarian talking points." Bookmark this very useful post.