PS2 mem card protocol

[Splynncryth]

I'm hoping somone knows where to find the PS2 mem card protocol. Paying $25-30 for 8 meg of flash ram seems rather excessive when I can get compact flash or smart media cards of the same size cheap, and NAND flash chips even cheaper. I also have done some USB development so I've considered using my PC as a big memory card

But my speculation is pointless if I don't have any idea how data is formatted and sent to the mem card for the PS2.