We've discovered a little gem in the iOS 4.3 beta: Four and five finger multi-touch 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.