This is my first stab at any type of photography, much less underwater. I'm using a Sony DSC-F707 in a Ikelite housing with a Ikelite DC125 Strobe.
These are some of the better ones I took. The flash has some compatability problems that Ikelite is working on so it was hit and miss on exposure at times with most pics taken with the camera in force flash mode and the strobe set at 1/8th.
I don't have a clue as to what I'm doing yet but felt the camera and housing both worked very well. I think for my first time out I got some good shots. I also thought the macro did a great job as I was able to get as close as the housing lens and still get it to focus. All of the pics on this post are greatly reduced for upload/download reasons.
Any thoughts or sugestions are welcome, I have a lot to learn before the next big trip.

Using macro at about 4 to 6 inches

Healthy wall with Scallop covered in life

Octo at about 40 feet

Two nudibranchs with no flash

Kelp at about 40 feet

Puget sound King crab

Anemone up against housing lens (macro of course)

Octo in hole at about 30 feet

Crab on starfish using macro at about 8 inches

Octo trying to blend in at 40 feet

Another scallop on a healthy wall