I posted the other day about a multi-touch gesture for duplicating an object, and Debra linked me to this Gesture Reference Guide. There’s a duplicate gesture described in the PDF but I’m not sure I understand or agree with the way it would work. Here it is:
My issues with this idea are that a) it doesn’t seem natural and b) it sounds like it would interfere with other gestures, like selecting more than one object, or even tapping two things sequentially — the tapper shouldn’t have to worry about releasing her first finger before tapping something else. I don’t see it listed as being implemented on any of the devices, so I guess it’s just Luke’s idea for the gesture.