AttoPilot International has a sweet deal for current AttoPilot 1.8 owners: just $300 to upgrade to 2.0. Why do it? Well, just look at this picture. That's some pretty amazing miniaturization! Smaller even than ArduPilot without its shield. Plus the AttoPilot folks upgraded my 1.8 unit to 2.0 software (actually, they did even better--they replaced it with new hardware because it was broken), so now I essentially have two 2.0 units. Best customer service ever!