I just finished soldering motors 1 and 2 pins in, and the power and ground pins. The lead-free solder that I have is total garbage, so I am unsatisfied with the solder job, but at least it was good enough to fire up the motor board. (I will definitely order some leaded solder...) The test for motor 1 and 2 seemed to go well with a 4.5v power source (three 393 batteries) and a tiny hobby motor.
I will say that the pins on the motor board's bottom will need to be trimmed really short after testing etc. The pins collide with... EVERYTHING! Because of that, I had to put a proto board beneath the motor board, to act as a spacer, because the USB, the Processor board, and the compass, could not be placed beneath the motor board... gah! For my final buttoned up project, I may just solder the motor wires directly to the board.
Sorry no pictures yet...