this morning i stumbled across a post in the pd- mailing list about an external to use the multitouchsupport.framework shipping with osx(>=10.5). it's quite easy to implement. so i gave it a quick try in openframeworks. .. i must clean up the code for the class..
it's stunning, that the trackpad of the new/recent macbooks supports many touches, only have ten fingers - more don't fit anyway. and tracks size & angle.
anyone tried as well?