First of all, everything I've read concerning that "turbo" P5 in the ProtegeTech gallery indicates that it is a show car - the turbo is non-functioning. I've even read that the car was PUSHED into position at that show.
That doesn't mean it is all bulls***, though. I've also read that the stock internals would be plenty strong for mild to moderate boost - even up and above 200 HP (Mitch from Protege5online.com was talking about a possible kit that'll get us close to 230HP - he's not known for talking trash, IMO).
Twin might be pushing it - this is a little four-cylinder motor, you know. Maybe it could be done, but the cost would probably be ridiculous. Everyone seems to cringe a little at spending $3k for a turbo - just imagine what a double set-up would cost. No one will develop it if no one buys it.
I agree that turbo is a nice idea, but everyone seems to think it should cost $500 or something. These things are expensive to research and produce. Ever see what Oscar Jackson charges for Miata superchargers? Once you buy the S/C and the extras (timing unit, knock sensor, intercooler) you're in the $4000 - $4500 range. And I've even read that the fitment isn't 100%!
I understand the desire for more power, but we all knew that we were only getting 130 ponies when we left the dealership (grinning WIDE, I might add). I, personally, wouldn't even consider such modifications until I am no longer under warranty. All I need is to have a great looking, useless vehicle with a blown motor and 4 years worth of payments left. These are serious bolt-on toys - they can screw your motor up if they are not up-to-par. I'll be waiting it all out - let 2 or three companies come out with T/Cs and/or S/Cs, and see some real-world statistics, as well as the facts about how long they'll last. And by then, the factory turbo P5 just might be here, and then I can zoom-zoom with full confidence and a warranty.