The big buzz for today is Al Gore’s scheduled 12:30 talk on climate science and policy-making. Unfortunately, he won’t be taking any questions, either from the audience or from reporters. But it should be interesting to hear what he has to say.

His movie An Inconvenient Truth is of course now out on DVD – and he’s challenging the public to host a wave of viewing parties, with the first this Saturday. What do you think – is he gearing up for another presidential run in 2008? Is climate an issue that American voters care about? If not, should they?