It would be nice if someone could design a RasPi 'shield' for that kind of application - with gyros, accelerometers and stuff.
That is on my to do list, I am currently finishing the layout of a board with 3 axis gyro, accelerometer and compass chips on it for a totally different project.
You could probably even fit it in a board half the size of Raspi, maybe even less if you go SMD
You have to go SMD, the latest cool chips aren't available in anything else. And it can be a LOT smaller than half the size of a Raspi, the connector will probably take up most of the board.
I might do a second version with a four channel ESC included, this would be able to report voltage, current and RPM back to the Raspi for maximum geekiness.