I just noticed bookmarked on Del.icio.us, Shuriken.se has a collection of free plugins available for the Music Ninjas. One plugin in particular is called Berrtill and it was modelled after a circuit bent Toy setup. I have not had a change to try it out yet, but it looks cool. The bitcrush parameter looks interesting, I wonder if it is simular to the hardware version like this Downgrade by The Squarewave Parade.