I was using the iPad last night and somehow managed to come across the new multi-touch gestures, not supposed to be available until iOS5 unless you jailbreak your iPad. I did a search on the net and it turns out they get enabled when you install xcode on your mac and setup your iPad to be development device. Which I did a few days ago. Now I can just swipe the screen from side to side to scroll though my open apps. Or pinch them to return to the homescreen.