JAFO, thanks for the great (and humorous) feedback!
I'm no expert on hardware but I know lots of people are using very inexpensive car satnav units, that they've fiddled with somehow, to run SkyAngel InFlight. There are quite a few replies in this thread from people confirming that the software runs on their device.
As soon as I can (hopefully within a week) I'll have a forum set up on the SkyAngel website specifically to discuss the hardware on which it'll run.