First, the Opera desktop browser got me totally addicted to mouse gestures and now the multi-touch trackpad has proved to be one of the major highlights of my new MacbookPro.
Jitouch, gives you the completely control over your multi-touch-trackpad-gestures. It lets you customize and add a lot more new gestures, and in decently innovative ways as well.

A few of the gestures just sold this app to me so well, that I am willing to ignore the mess the creators have created by going overboard with the crazy amount of default gestures this app switches on! I have disabled ALL OF THEM, apart from:
I would also use the “Character gestures” if I could only get them to work! All in all, for $5.99 .. actually I haven’t decided if I would pay for this yet.
In other news, the rumors of the Magic Trackpad sound interesting. It would work perfectly with my desk-laptop combination!