cool.. 40 meters? i plan to buy the Olympus underwatercam. thats the only cam brand that sells underwater cam here (as far as i know) but it only goes down at the max of 10m. :(
u should love it. first shot and tis already exceptional :D very nice.
My housing actually goes down to 40m, but i took it a bit lower once before and it was fine. I really love this shot, it was one of the first i ever took with the camera!