I was generally browsing last night, and I came across Better Touch Tool. It's simply brilliant! It gives you so much more control over what you can do with the trackpad! I've only played with it for a little while, so haven't fully kitted it out, but I've added 3 finger click, 4 finger click to refresh pages and open new tabs in safari, and made tapping the top/bottom left corner to change volume controls. However, there's 3/4/5 finger swipes, 3/4/5 finger clicks/taps, tiptaps, corner specific taps, and basically anything you could think of! The other great feature is it enables the windows 7 feature of windows snapping, so you move a window to the side of the screen, and it automatically resizes it to take up half the screen. Also, if you move it to the top of the screen it maximises it the windows, which I know loads of people wish they could do! The software is completely free, and just so useful. Makes the touchpad even better! Just so you know, I have absolutely no affiliation with the guy who writes the software, I just thought it was fantastic, so thought everyone should know about it. The maximisation alone makes it worth the downloading in my opinion!