I enjoyed my Nikon S3 very much - but it died on me after only a few months. I was rather unimpressed by how short it lastest. Admittedly the camera had been through the wars, but in fact had been (mis)treated no worse than my old Canon Ixus II with my brother now uses underwater. And that is still going strong.
The problem was that my sensor just stopped working - and the guys from Nikon UK said it wouldn't qualify for a warranty repair because of the physical damage - which in their view was the cause of the failure.
The camera actually died while re-charging on the shearwater - and this ended up being the last thing I shot with it:
http://www.amustard.com/temps/tiger1.mov
There are some who suggest it was scared to death. Anyway it's orbituary is here:
http://www.amustard.com/?page=kit&ext=s3&s...ge=photo&size=s
I'm not too fussed and it will still continue to function in its primary role as model's camera!
And anyway after that brief Nikon adventure I have returned to the Canon fold with a Ixus 55. Currently there is no diving housing for this one - which might also aid longevity.
Alex