I just ordered an Asus EEEPC T101MT tablet last day from amazon.com. It hasn't arrived yet, but I was already looking at installing ubuntu on it, and since Apple apparently has patents on the Multitouch gestures, many of the multitouch features are not available on linux yet. I was looking at alternatives and came across Easystroke Gesture Recognition.
Project Page: http://easystroke.sourceforge.net/
What's better than a couple of demo videos to show you what it's like? So here they are