If you're not into huge watercooling set ups, but want to get the biggest OC out of your 8800gtx, without using a full blown water cooling or extreme cooling solution, this would definetly be for yuou.
apparently the 8 series cards have an integrated PPU, or so i have read around here. that is just ridiculous though, Asus say it's a space saver. of course, all space saving solutions take 4 slots and actually block a PCI slot .
Yeah, Unless motherboard companies drop the "ATX" form and start making motherboards in "stupidly big" then I don't see any reason to own one of these. It's a cool idea but not very practical. The card itself already takes up a huge amount of space, most people run a sound card or Network card. By the time you put a water-cooling card in you won't have any space left for what you actually need in there.