"The USB source will be mounted in some kind of housing
that the device can very easily and clumsily fit in to. Both the
USB source device/charger and the robot itself will contain a radio
[definitely 802.11g later], but for now a simple FM oscillator
would probably be good. The software will also have access to this
radio. The device will maintain contact with it’s base
station. IR won’t be any good here as the device needs some
kind of a range. I’ll need to assess the practicality of
range vs hardware."