Speaking of the blog doesn't the post titled, "Baby Jet Controller" directly contradict what is being said here in this forum?  

On the blog it says, "The Baby Jet ships with a built in Raspberry Pi model B. This acts as the controller for the one or two GN chips in the Baby Jet. The controller talks to the chips over its internal serial port." but in recent posts on this forum company representatives are saying that each "mini-board" will communicate with the controller over USB.

So no the content of the blog hasn't escaped notice which is why I was surprised when it was said that the boards connected to the controller via USB vs. the earlier stated serial connection.