Underwater Sport Housing
Wetpixel.com is also a great resource for discussing underwater housings, both for surf and diving variations. I went diving last year with a G11 and Canon450D and the SLR was amazing compared to the compact, particularly for sunburst effects and responsiveness for fast-moving fish.
For what its worth, I love my Sea&Sea housing...
|From Maroon to Yellow by Azrocin|
from Fall colour
|Mandarin Duck by gordzam|
|Porsche 918 Spyder by rmw18k|
from Sports car