The iQue Card is housed in a plastic shell, which contains a Samsung K9F1208U0M-YCB0 NAND chip on a special PCB codenamed "DOOKIE". The contents of the NAND are documented on the NAND page.
The DOOKIE board is very basic, and it contains the NAND flash, a few resistors, and an edge connector to connect with an iQue Player. The connector has a 1.1mm pitch and seems to be custom made. No other commonly-available connector appears to fit in it except the MicroSD.