There have been some discussion about multi touch in the past years. but as far I can see there are a bazillion different way of accessing the multi touch events of a screen. and which one works depends on what actual hardware you have.
Will there be some multitouch node, like there is a mouse node that will talk to windows so it will work no matter what kind of touch device you have? That would simplify life considerably.
I have asked a similar question over a year ago, but I am wondering if the world has changed since in this regard