Thanks all.
Jflip - I think the tank may actually be doing better than when I left. Big thanks to Eric (glassbox-design) and Brandon (ataylo13) for looking after it for me while I was away.
skey - I used a Canon G9, Ikelite housing, Ikelite DS51 strobe, and an Inon UWL-100 wide angle lens. Based on my research this really seems like the best bang for your buck for an underwater setup. G9s are going cheap now too since the G10 has been introduced. Unfortunately, the upgrade from 35mm to 28mm from the G9 to the G10 seems to have made wide angle lens use a problem (at least Ikelite has not yet come up with a solution). So until they come up with a solution the G9 is the way to go for UW photos.