I am a huge fan of gadgets, that being said I found this interesting scuba mask that allows you to do HD video and take pictures while your under water. The video camera can film at 30 frames per second in (1280-720) and the still camera shoots 5 mega pixel images. If you would like to read more about this you can find more info at PDN or if you want to own this gadget look here at B&H or at Liquid Images.
Cooper Ricketts Photography Blog 