I've got a Canon S400.
4.0 megapixels, ISO 400, pretty good macro
There's also an S500 model out there, 5.0 megapixels.
It's not as nice as the G5 and some larger models, but it's classified as an 'ultra-compact' camera. i bought it because it's small enough to toss in my pocket for football games and sporting events, and hiking, yet still has the capabilities of some larger cameras.
check on
http://www.dpreview.com for some comparisons
I have to play with the settings, and like most digital cameras it takes a bunch of shots to come out with the one you want. But I like it, good "Swiss Army camera": plenty of capabilities and tools in a small package. Includes 3 minutes of video too, comes in handy to catch those last-minute buzzer-beater basketball shots.:yes:
I'll post some other shots later on, some scenery ones, if you're interested in non-fish capabilities.