The electric turbo looks neat, but boost goes DOWN with speed. Starts at 5-6 psi, goes down to 3 psi at higher speeds. Takes to much juice to spin it up at high speeds. I think I'll stick to the remote setup -- can do that with mostly salvaged parts too.
Why is this a problem? Except for race conditions, boost at low speeds, and less so at cruise, would seem perfect. A small displacement engine is fine flat-and-level, but lacks torque for accelleration.
The real advantage to the electric supercharger would be software control -- essentially the times when you'd be lugging it, you boost the hell out of it, and back off at highway cruise.