Good news, bad news from Sparkfun's big UAV push: ArduPilot
and Bill Premerlani's autopilot board
both sold out in the first week (I think ArduPilot sold out in it's first ten minutes!), as did Dean Goedde's AttoPilot power sensor
. All are available to backorder, and I know at least another 15 ArduPilots have already been filled from backorder, with another production run of about 100 about to start. Bill's board is on the production schedule for restocking and Dean has lots more of his current sensor boards on the way to Sparkfun. I expect all inventory issues will have stabilized within a month.
The next round of ArduPilots will have a small tweak on the power regulator that will bring the board voltage closer to 5v (rather than the current 4.3v). This should have no effect on the board itself, but will make it easier to add accessories and other sensor that may be more voltage sensitive than ArduPilot itself.