I have the Canon D10 as my fishing camera. It takes great pictures, I can post some if you wish. It is built like a rock, it'll take all the beating, water, etc. you want to give it and keep on ticking. The real selling point for me was it's boot up speed. Powers up quick, focuses quick, you're shooting in no time. In that respect, it blows away the other P&S waterproofs out there. I think it takes better pics too. I personally love it. The battery, when fully charged, lasts forever too!
Now, the "don't likes"
-The egg shape. It doesn't fit in any pockets. I strap it to my wading straps and keep it under the waders. But I gotta get a better system, I'm too slow to get it out, and when I do, it's sometimes fogged. This could be fixed if I spent the money on all the optional strap systems, but that costs like as much as the camera did. Also, the way my hand falls on it naturally, I sometimes get a big close up of my fingers, I have to keep that in mind.
-Underwater. I don't seem to get as good of underwater shots as some of the guys with other models. It could be the camera. It could just as easily be the operator/lack of experience. Also, since I've had it, I haven't had too many oportunities to try it in crystal clear water.