Paul is right, compared to the days of film, digital imaging HAS caused a "bump" in divers taking photos underwater...
And the number of divers taking GOOD photos has increased significantly! I have a dive friend who -- until recently -- dove with an Oly 5050 and single strobe, and he was taking FAR better photos than I did back when I was shooting film!
Now he has moved up to a 20D in an Ikelite housing (which is not a horrendously expensive rig), and I expect he'll be getting even better results, but the point is that you don't NEED an expensive DSLR to get outstanding uw photos if you study and practice technique enough!
Frankly, Lloyd, if the cost of housing your Rebl XT just seems prohibitively high, buy a good P&S (I'm not sure if the Oly is still the best option, but there's a forum here where you can find out) and its inexpensive manufacturer's housing, and have fun with that. Not only will you be able to take outstanding uw photos, but you'll have a compact camera for above water use when it's impractical to carry your XT. Then, after a couple of years, when you'll probably be upgrading from your XT to a newer, fancier DSLR anyway, you can buy a housing for THAT, and make the (more expensive) transition many of us have now made (to uw DSLR).
The important thing is this: if you want to take photos underwater, DO IT! If you simply can't afford (or can't justify/live with) spending the high prices of uw DSLR housings, that's fine -- start shooting with a good (but far less expensive) P&S rig. The important thing is to START SHOOTING! If you're like the rest of us in this thread, you'll end up deciding that blowing a higher portion of your recreational budget than you used to think was "reasonable" on uw photo gear is actually well worth it in the end. ![]()