ScitechWA posted a project showing off his skills on a Self Balancing Unicycle. He reuses a bunch of stuff from his past projects. The build cobbles together several development boards including an IMU from Sparkfun, an Arduino Nano, and a Sabertooth dual 25A motor diver. After drilling down into the article a little we were able to find the Arduino sketch originally posted by XenonJohn.
If you are interested in building your own self balancing mode of transportation you’ll have to do some more research as this build log leaves a lot to your imagination.