LastApp is developed by the one who also also brought Kirikae and Backgrounder to us.
And the good news is no need to spend a dollar to bring this app to your device because it is free and can be found under BigBoss repository.
And after the tweak is entirely installed you need to specify the gesture in Activator pane within Settngs.app and then
LastApp is now supporting iOs 5 firmware, and to get this app installed on you device, as always jailbreak your device first with Redsn0w. Or you can fix iBooks crash too with the recent update of Corona 1.0-5. And see you again in another post.