Posted in the North East forums as well, but I'm willing to ship.
I have a custom water housing built by Sonny Miller specfically for the dvx. Has zoom control and other features. Totally solid and looks sick, I just don't think I'd use it enough to warrant keeping it. I can post or e-mail pictures if there's interest.
That **** looks heavy .It looks like it would be a hassle to film with such a bulky item.
It's a waterhousing, so as the name implies, you're filming in water. Water makes light and non-dense objects float. You don't want a light setup as it will create more of a hassle to try and keep it down. It's seemed to work great for Blue Crush, Riding Giants, and Lords of Dogtown...