Vimeo member Stephen Diaz has already received the GoPro Dive Housing (Flat Lens) which allows the GoPro to focus properly underwater. Here's an early test video. The GoPro Dive housing is a must have to improve the quality of underwater footage, and fortunately it's the cheapest Flat Lens upgrade available for around $49 dollars. [Thanks Stephen].

GoPro Dive Housing AFLTH-001