Mike just ordered a Sparkfun Rover 5 chassis ($60), and Steven decided to test drive it at 12V using his new quad-bridge driver board, in turn hooked to an Arduino Mega (for the interrupt lines) and an XBee for wireless serial communication.
It’s a nice little platform, big enough to put a laptop and some actuators on, and it moves authoritatively when driven at 12V. It tracks quite straight even without using the onboard encoders. Mark, from Mount Edgecumbe, suggested putting on Mechanum wheels, so the chassis can translate sideways too.
We’ll work on a decent mounting system, so all the electronics don’t fall out when the thing tips over!