Thanks for the quick replies.
Here's the housing: http://img78.imageshack.us/img78/5194/p1010245th2.jpg
It's a 10 gallon glass aquarium.
Substrate is a terranium lining that's supposedly been treated with enzymes.
Clear water container is half gallon, black one is a little less.
Heat lamp is a 60 watt ExoTerra daylight lamp.
Heating pad is an ExoTerra 8"x8" 4 watt rainforest type.
And here's a video of Regis catching his first mouse, since bringing him home (you might have to turn up the brightness... it looked fine on my laptop's LCD):
http://youtube.com/watch?v=zrjxvawcKyY