Hi,
I'm the one who posted this on DX :-) Was here looking for info on mods and possible manufacturer firmware, and stumbled upon a familiar message.
By the way, I haven't gotten the digital compass to work on my device (which looks like the X10 airpad but apparently is not exactly the same). It seems that linux kernel version 2.6.32.27 (at least the default tree) does not have a driver for the compass chip AK8973 - some later versions have a driver for AK8975, and I've seen a 8973 driver also somewhere. Also didn't find a driver inside the tablet tree.
I've set up a compiling environment so I can compile kernel modules (drivers) for the device, and got some modules to load, but the real-world-useful btusb.ko just freezes the machine for now.
I'd be grateful if I could get the airpad firmware, I think the device I have is sufficiently similar so it would work.