http://www.chiefdelphi.com/forums/sh...d.php?t=121540
I made my own controller this year using an accelerometer and an Arduino. It's pretty cool. I used an MPU6050 3-axis accelerometer and an Arduino Uno. I also used an LCD screen to present the speed it sends out to Driver Station. There are some pics in the referenced thread.
Good luck!
Alex Brinister