I opened up mine; its a plethora of descrete boards, 4 to be exact. Its definitely not designed for manufacturability, but how dare I question the French!
The CPU board uses a MPC823 PowerPC chip. This board also carries the non-upgradable 33.6 modem chip, ram, rom, and flash chips. Its a cute little thing that's not much bigger than a 3.5" hard drive when its shielding is installed. This CPU is targeted at the PDA market, so I don't think there is an IDE interface.
There is also a power/modem-interface board, a card reader board, and a button board.
I think this thing could run Linux, but that's beyond my capabilities. I could probably overclock the thing and maybe hack a USB port onto it, but software is not my bag. Sure would be fun though!