I don't know what model it was, but I was in a cave with a guy that lost his Olympus in about 30' of water. We found it an hour later and the damn thing still worked well. It got some water behind a protective cover over the lens, but it dried out in a few days.
I was pretty impressed, I figured it would have been drowned since it is not rated for that deep.
I am seriously considering one for a vacation camera.