IGN's Game Scoop! Podcast covered a wide variety of topics this week, including answering a brief question on Scribblenauts (49:00 - 50:10).
Specifically, the question was about the controls of Scribblenauts. As you can see in different demo videos, you use the touch screen to tell Maxwell where to move to, while the D-Pad can be used to move the camera. They also mentioned that when you generate an object, you simply drop it into the field of play, which could cause the object to flip upside down or something like that. Therefore, when you pick the object up again, you can use the L and R buttons to rotate the object. The guys from Game Scoop! did seem a bit frustrated overall by the controls, which is something that has been heard before by other people playing the demo due to the ton of objects that could be at screen at once.
We'll see how the controls work out Sept. 15th.