My own brief and mostly ignorant thoughts:

Yes, climate change is happening and mostly anthropogenic. (I believe this not because I've studied arguments and counterarguments, but because this is the claim that several public "global warming skeptics" have changed their minds to believe; there's a good bit of diversity among people who think AGW exists.)

I'm really skeptical that we can do anything about climate change through policy. I've seen the kinds of bills that get passed in the US; they don't actually reduce carbon emissions on net. I've seen what happens at international meetings; poorer countries want a chance to industrialize too. A third option would be exhorting people to live green -- but to actually have an effect on climate change, we're not talking a few CFL bulbs, we're talking a complete overhaul of one's lifestyle, and most people (myself included) are not willing to live like that. Many simply can't.

I've also seen convincing arguments that, even giving ideal policy and angelic people, the cost of mitigating climate change isn't worth the benefit.

So basically I think we're all going to die. In rich countries we'll buy our way out of most of the trouble, and feel it mostly in higher prices and water rations in desert regions and truly nauseating summers. People in poor Equatorial countries will actually have humanitarian catastrophes. The rest of us won't care very much.