Here's a link to my first attempt at U/W digital photography. My rig is an Olympus C5050z with PT-015 housing, Sea & Sea YS90DX strobe, Aquatica flip tray adapted from a Nikonos RS, TLC arms, 1-128 dX and 2-512 CF cards, Archos Multimedia Jukebox. These were all shot in Manual generally between f5.6 and f8 at 1/60 or 1/125. All other settings were stock.
I have a long way to go to match the capabilities of the camera, but I wish a had a DSLR, the shutter lag and write-time lag were very frustrating. I got a lot of "fish-butt" photos.
I also wish I had a WAL. It will be my next purchase.
http://www.tedjanssen.com/pages/765995/index.htm