If you're going to buy the new MacBook Pro (or another Apple laptop with multi-touch trackpad functionality) you'll want to get the application MultiClutch. It

If you're going to buy the new MacBook Pro (or another Apple laptop with multi-touch trackpad functionality) you'll want to get the application MultiClutch. It basically lets you set up rules globally or per-application that assigns gestures to keyboard shortcuts. In other words: if I'm in Safari, I can remap three-finger swipe to changing tabs, swipe down for new tab, rotate right/left to back and forward, etc. It's very useful.