When I was at Tim Flannery's talk in Edinburgh last week, the great man pooh-poohed the idea that the whole global warming scare was a pretext for global government. This was quite surprising given the number of people who have been openly discussing the idea in recent months.
By coincidence, the Guardian carries a preview of the speech James Hansen will give in Edinburgh next week (I will be in attendance). Hansen is going to use the platform to issue a call for a global carbon tax. It seems hard to envisage any way this would be brought about without some form of global government/governance. I imagine this would be something along the lines of the UN - a huge bureaucracy nominally answerable to national governments but in practice entirely unaccountable.