notch, creator of Minecraft, has announced a new space-themed MMO, with people being able to write code against a 16-bit machine architecture, which will be executed to fly your ship around, even while you're not connected to the game.
This is a c implementation of that machine architecture.
I don't think we have any info on sensors or actuators for the ships though, yet...
Someone should make something analogous to the GertBoard for the Raspberrypi[0], except virtually, to solve that problem
[0]http://www.raspberrypi.org/archives/411