I have started watching the NVISION 2008 videos, more on that later. At the same event there was an Ultimate Case Mod Challenge where people supped up their hardware. The coverage on the nvidia site has images of a fair few of them, revealing many lights, tubes, fans and custom aesthetics for us to see. There is a peculiar type of 'look' that case-modders go for and sometimes simpler is better. The winner was actually a quite neat and understated piece of hardware, powerful as it was with all the liquid cooling.
[Extreme case mod entry from nvision2008 via the nvidia site coverage]