has anyone actual gamer use Liquid Nitrogen daily (for the really extreme hardcore ones...) and then
overclock their machines close to 5Ghz/highest possible stable processor speed ?

I mean, the point of using LN2 is to simply see how far you can push the clock speed. But there isn't really much use... but that's part of the fun I know.

Imagine playing Crysis at 2560x1600 4x FSAA 16x AF Very High DX10 in Vista at steady speeds