One of the guys at BBC R&I sent this around today. I only just watched this today but I'm really amazed. This is awesome stuff and reminds me I need to get my Wiimote working with my Ubuntu boxes.
I've also been thinking, everyones using that pinch movement/behaviour to indicate scale but what other interactions/behaviours? Is there more which have yet to become standard? Maybe a cycle of the fingers in tandum could indicate master volume or something more? Maybe 3 fingers down the screen could indicate something which should be deleted and 3 up something to be uploaded. The beauty of this low cost setup is that anyone can play and make up there own commands, its no longer just in the research labs. This is great and I'm always in favor of that.