Last week there was a press conference with Jim Hansen, Eelco Rohling, & Ken Caldeira at the AGU. I'm a bit late on it, just got round to catching up on RC's coverage of it. But this is well worth watching, including the press questions at the end. Rather than use the Blogger video window - which is too small for this - here's a link to the Youtube page. The accompanying powerpoint presentation is available here.