check out
http://www.superkaos.com/phpbb/
They have a whole forum dedicated to turboing bikes. There are also plenty of videos of turbo'd bikes.
Both turboing and engine work have their advantages. Engine work has a more "controllable" power feel to it, whereas turbo's have an instant "balls to the wall" feel. I'm sure its quite a feeling when 17 lbs. of boost kick in under your ass....