anything over a 2 meg a pixal is a good camera. i like a sony because of the lithium battery all others are just a pain with regular AA batterys heres some old pictures http://jaysreeftank.homestead.com/
Olympus C-3000 (3.3)
They do come with some kind of lithium batteries (not sure exactly what type, my husband is the one that knows about the camera) and you can also use rechargeable ones.
Here is a picture of our elegance coral. http://public.fotki.com/Goldmoon/aquarium/elegance2.html
I just got a Nikon Coolpix 995 and it's great. Got one for $687.00 at turboprice.com
Here's a link to a few of the pictures so far...my reef
Some of these pictures were taken the day I got the camera. I have no previous photography experience. So the camera's automatic everything features work very well.