I got mine, and for some reason, it gives me an error when I try to use my 8gb (Format error) and asks me to format either with FAT16 or FAT32 (I chose FAT32). My card is an ADATA (which worked fine in my Z64).

Also, can this card use .SAV files from emulators, or how about save files from copiers like the Super Wildcard DX2?