In reply to teflonpete:
I had the Panasonic one. It was excellent but I lost it.
I now have the Sony one. It is lighter, smaller and has a sliding cover for the lens window which helps stop it getting splashed or fugged up (very useful), though it's touch screen is a bit irritating especially with damp fingers(ok if you tend to keep it in idiot mode though).
When I looked into it the Panasonic and Sony came out comfortably best in reviews for picture quality. I have used and would recommend either for kayaking, winter climbing etc.