"Casting a critical eye on climate models" by Anil Ananthaswamy (posted on Jan 17, 2010 on the New Scientists magazine website) is a very informative and timely article. 

http://www.newscientist.com/article/mg20927951.400-casting-a-critical-eye-on-climate-models.html?full=true

Unfortunately, the online version of this article does not contain the graphic, "Model behaviour" that is in the print version. It is one of the best graphics about climate change that I have come across.