this is a very interesting link, especialy for the guy form the #25 post.
http://membres.lycos.fr/miniforum/manuel.html
the only problem is that it is in french, but it can be read through bebelfish.altavista.com or something like that
it seems that actually only the nand flash memory of the players is samsung, while the chip that does all the work is "atj2085"
hope it helps