Arduino FPV RC flight instrumentation

If you haven't heard about FPV flying, check it out:

I'm using arduino to display low battery voltage warning and ground proximity (with a ultrasonic sensor) in flight. Here's a video:
http://www.veoh.com/videos/v8567662mGXeNbNN

Cheers,
-Z-

Like the "pancam"--nice track in the background too.