I'm still inclined to side with the majority opinion, supported by peer review. It's all well and good that he can claim these things, but it all comes down to whether you're willing to believe that he's thinking clearly or just being a denialist- even if the people doing research are all in the pockets of someone with an agenda, surely peer reviewers will have something to say.
On the other hand, an independent panel basically decided this 'climategate' (augh, I hate that label with a burning passion)
is nothing to get your knickers in a twist about. If you really want to poke at it more, you could claim that panel is
also in somebody's pocket, but that's getting into conspiracy theory territory, IMHO. Given that, he's probably a nutjob- but I'm willing to not utterly dismiss him in the interest of avoiding a flamewar.
Phil Plait has a lot to say about
climate change, mostly in favor of
good old-fashioned science rather than manufactured politicized debate. He obviously has an unstated point of view here, but his credentials as a
skeptic allow me to trust his conclusions.