Thanks for that link - I was not aware of that project. That connects to the AHRS via USB - I was thinking of something that ran independantly of the aircraft. Which is why I thought a Maemo 5 device (read: accelerometer capable Maemo device) with GPS could be configured to provide airspeed, altitude, and attitude (through something like Jaffa's Horizon). It could at least serve as a backup for the main gauges. The 'Airman' application could also store things like flight manuals, maps, and checklists as part of an EFB (electronic flight bag). Obviously more of a novelty item, as opposed to something you would solely rely upon in the cockpit. And sorry for taking this thread off-topic...