It's getting cold and I'm limited by space to fly and money to repair crashes, so I'm going to feed all my toy-wants by starting off with an AGV, and using the knowledge and experience to make liftoff next spring smoother than would otherwise be.
Basic crawler ESC and Motor installed: $130-ish
What I had on hand: Arduino Nano V3 and breakout board
Purpose: Main Processing
IR Distance measurement using a Sharp GP2D15 on a pan/tilt
What I bought: ArduIMU+ V2 Flat, and HMC5843 - Triple Axis Magnetometer
Purpose: Rollover warning, impact sensing, heading input, turn-rate input, future GPS
The CreepyAGV V1.0