Look at Vincent Laforet's blog. He tested the new Canon 5D mark 2 over a weekend and discovered that it has absolutely stunning low light performance and deals with strange white balance like no other camera. The following picture is a frame grab from some videos he took one night.

Not only is the video of excellent sharpness and resolution (shot at 1080i) it is taken straight from a RAW quicktime dump without any post processing. Now, if you have a camera that can take 21 Mpixel shots and full HD video and produce this quality in very bad light conditions, that camera should be an awesome dive camera. $3000 plus a couple of lenses plus a housing......
