> Have you seen the videos of the metaball modelers Teddy and ShapeShop (a.k.a. BlobShop) ?

Yeah I've seen that it is pretty cool. Gestures kind of worry me a bit in general, with too complex ones seeming to be pretty hard to remember, but that scribble=erase one is pretty good exception to that, it's easy to remember and I think distinctive enough that it gets recognized with a really high accuracy rate.

- Michael