I'll +1 for an update.
I'm right on the verge of ordering all the parts, but wondering what of the current parts will be reusable with ArduMega.
ie: XYZ sensors is obviously downlevel, as would be the current Ardupilot board.
uBlox should work on Mega.
What about the airspeed shield? integrated to mega?
ArduIMU is really cool, but seems to hold no value when mega is out.
I guess if I know I'm only throwing away $25 for the main ardupilot board, I'm OK with that until mega comes out, just to get started with learning, cabling, GPS and airspeed (without the XYZ sensors).
I want to get started now! But the market is kind of "frozen" right now for me.