We've discovered a little gem in the iOS 4.3 beta: Four-finger and five-finger multitouch gesture support for the iPad. Here's how it looks in action.
Each of the new gestures can be done with either four or five fingers - your choice - and they all work smoothly. A pinch brings you to the Home Screen, a swipe up or down reveals and hides the multitasking bar, and swipes left or right allow you to switch between apps.
All the gestures feel natural - particularly the Home Screen pinch - and at no point during my testing did I feel like I would accidentally trigger one of them.