From what I can see the Magic Mouse supports holding Control on the Keyboard, then Swiping on the Mouse Vertically to Zoom in and out, but it does not say if it supports this or other multi-touch gestures like Pinch-to-Zoom etc. Nice idea, will this be supported, the only multi-touch gestures seem to be the two-finger swipes and two fingered click (this is an interesting alternative to double-click on Windows. Wonder if any of the Microsoft Research concepts mice will see the light of day now...