I just bought a SeaLife Sportdiver II on the recommendation of a fellow diver. Judging by my friends pictures (I haven't had a chance to use my own yet) it's a sweet camera, totally upgradable to macro lenses and strobe. http://www.sealife-cameras.com/index.html
edit to include:
check this out - http://www.diverssupplyusa.com/index.asp?PageAction=VIEWCATS&Category=692
- it's only $70 USD here! Hella good price!