That's really good news. The price seems quite low too. Basically for $100, we get a $60 robot controller, $32 worth of motors, and the whole rest of the robot as well as libraries to help program it.
By the way, what is the diameter of the robot? For some reason I had the impression it was around 6" after viewing the videos. But now looking at the picture, based on the LCD and batteries, it looks closer to 4".