This was part what was detailed in the developer page we showed you earlier (link). It looks like the iOS 4.3 update for iPad (iPad 4.3, we will call it) will include multitouch gestures similar to what one would find on the MacBook's trackpad.
Pinching with four or five fingers will bring you the homescreen, while a swipe will bring up the multitask dock and swiping right and left will switch between open applications. Apple is asking developers to give feedback on how the features work, and what they would like to see. Pretty cool, huh?