From the dregs of slashdot comments comes a link to Global Warming Sceptic Bingo. I can’t recommend watching the video clip suggested to play it to, it’s not terribly interesting, however you can probably play a pretty effective game any time the topic comes up on television or shows up in a discussion forum. The links it has to refute each of the points are generally pretty good, many go to the relevant posts on the RealClimate blog.