[Bill Swizz]

Any UK listers know this company? is it a reputable outfit? Anyway, I'm pretty happy with the Elise as it sits right now so not much hurry to mess with it.

Turbo technics are very well known here. They have a very good reputation for the support they provide to customers and the product seems well developed. I believe the offer options to take the standard 120bhp elise up to 190,215,230 or 260bhp.
I suggest you join the yahoo TT elises group and you should get all the info you need. I would have thought that it would be likely that they would offer a supercharger conversion at some point. If enough of you guys get in contact with them and convince them it is worth doing then I'm sure they will.