The liquid-cooling specialists at Danger Den have partnered with BFG Technologies and released a water-cooled GeForce 8800GTX. Retailing for $799, this stock speed 8800 frees up an expansion slot by removing the bulky fan that is partnered with the standard model. It doesn't look like Danger Den is marketing their water block by itself just yet, so if you want to integrate your 8800 into your water-cooled rig, this may be your only option.
I'm disappointed that BFG didn't crank up the clock speeds to take advantage of the enhanced cooling, but any serious water-cooler is probably capable of doing that on their own. Even at stock speeds, this beast is outperforming every other card on the market, including some dual-card setups from both NVIDIA and rival ATI.