Ive been looking into this for my Z. One thing I was reading about that sounded particularly interesting (I'll see if I can't find the link agian) was a system that used the same solenoid that triggers the nitrous to trigger a methanol injector located just aft of the MAF sensor. The combined effect of the nitrous and the intercooling (provided by the methonal almost instantly evaporating) is further enhanced by the fact that methanol also helps prevent detonation.

Sounded pretty neat.