It's flickered through my fevered brain. I sometimes look at those alarm clocks that can project the time on the ceiling and I think hmm....
At the moment I just have a simple array of 5 leds permaently mounted to show what gear the bike is in. Any other I/O is done by serial cable or bluetooth.
My secret weapon is a new nerd-watch from TI that I'm hoping to mount on my handlebar as a wireless display.
