I know it's a very old topic, but i got one of these devices and opened it up to give some infos in the people interested in it.
motherboard is a zx8280p-9b2b revision 2.2
The flash rom is a nynix h27ubg 8t 2btr (bc 2 05AA) and there's an extra soldering slot available on motherboard
the processor is a ATJ 2279b zc 71bbba8a
from my understanding the ram is from samsung 019 k4t 1g 164 qe-hcf8 (if i sourced well it should be 1gb ddr ram?)
well this is all i digged out so far, hope this might be of use to someone!