As I’m sure you’ve learned by reading the MacBook Air website and/ or watching the Keynote, the MacBook Air has a multi-touch trackpad with the same kinds of features and gestures as the iPhone/ iPod Touch. Some of these require 3 fingers, but a good chunk of the useful ones require only 2 fingers. This means that technically all of the current MacBook and MacBook Pro trackpads probably have the sensitivity to have those gestures enable-able on them. One way or the other 10.5.2 may give all us current MacBook and MacBook Pro users the better interface for choosing the gestures to use. I guess we’ll just see when 10.5.2 goes public in a few weeks. Enjoy, Alex.