Just discovered BetterTouchTool today. This sucker brings tremendous power to the Air trackpad, or any trackpad for the matter. It has over 50 finger gestures and over 50 different actions for navigating your laptop. Using this program with Butler and MenuPop, it will greatly reduce the amount of times I go to the Dockwhich is always in hidden modeand Finder folders. Check it out here: http://blog.boastr.net/?page_id=1619. Its donationware (totally worth sending money), and it will take a you a little time to get used to. Theres several YouTube videos out on already.