there have been a few questions about this
general result is that the new advanced gestures are NOT POSSIBLE on current hardware
although the current mb(p) can detect two fingers, there is a difference in being able to detect two points of contact and two points of contact and also monitoring each points movement separately
its hard to explain, but i dont think it will happen with current hardware
may i ask why you want it?
i new gestures, zoom, rotate, and next/previous are faster to do on a keyboard than with the trackpad
for example, rotating a photo 180 degrees would be faster to position the mouse and double click with the trackpad than it would having to move one finger around another