Discussion of this story is making its way across several of the email lists that I'm on.
Here's the website for the Evangelical Climate Initiative with a list of signatories here.
No real surprises on the signatories from what I can see. You don't see Ralph Reed or James Dobson jumping on this bandwagon, of course. Jeff Greenway, president of Asbury Seminary (where I attended) signed, which makes me feel good about my alma mater. And I wasn't surprised to see Brian McLaren's name on the list, along with Andy Crouch, both leaders in the emerging church movement.
This promises to be an interesting and lively debate, no doubt.