Just a quick update to point you at another video I just uploaded.
More Parallax wood platform robot fun
I added a IR detector and an XBee module. They're on a breadboard for now. Just so I could get it functioning. I coded it so I could drive the robot around using a tv remote and it reports move and turn commands back to my PC via XBee. I have another XBee module hooked up to the PC via USB.