Why settle for water cooling?

I've seen LN2 or Vapochill used a few times, but I think the reason watercooling is more wide-spread is simply because it's cheaper and easier to work with.

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I think it would mostly be because when you go past passive cooling (such as water cooling) to an active refrigerant then you have to worry about ambient humidity combining with the extremely cool heat exchanger on the CPU to cause water condensation on or around the CPU. Since no one likes running a system with a wet CPU, this means that you usually have to either keep such a system in a completely humidity-free controlled environment, or you have to add a heating element to the cooling system to prevent condensation and/or freezing.

Needless to say, this makes the water cooling system (which just uses water at ambient room temperature) a heck of a lot easier to set up and maintain.

If water isn't neato-keen enough for you though, you could always fill the system with pretty colored automobile anti-freeze.

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