Plastic nubs and stickers are tacky! If you want to add some real control to your iPad, do it right. And doing it right is attaching a real, arcade-style aluminum joystick to your iPad's screen.
The JOYSTICK-IT works by attaching itself to the screen with a suction cup and using conductive foam to make the iPad's capacitive touchscreen register input. Since it's removable, you can put it wherever the d-pad of each game is. Watch the joystick in action:
It seems like the nub is the perfect height and the whole stick is easy to control. It's supposed to become available in limited qualities in late January for $25. Head over to ThinkGeek to get your name on the list. [ThinkGeek]