I have only put about 20k (miles) on my G since I bought it in 2000 so I don't realy put a lot of miles on it per year, I will be getting a new Fidanza flywheel shortly and was thinking about just putting it in with out changing the clutch since it dosn't have many miles on it and will probably be a few more years untill it's worn out. So my question is do's this sound like a good idea?

I think you should be fine as long as you don't monkey up the clutch disc or the pressure plate during the installation. i've seen old clutches used again during a motor swap, this really shouldn't be any different. I'm just not sure how the breakin would be with a new flywheel, I know it wouldn't be like a new clutch, but I'd assume (although I'm probably wrong :-\ ) there's a little break in time required. It'd be like old brake pads, but resurfaced rotors?

Thanks.

Clutches are cheap. The labor to install them is not. If it's out, replace it. That's what I would do.