Reading and writing to a multimedia card

Has anyone tried to read and write data from a multimedia card. I know it is a SPI interface but havn't tried it ...yet. Anybody know of a good site to get tech data for the cards. Like the ones used in PDAs

i think this site can help u:
FAT on CompactFlash, SD/MMC cards and USB sticks

Perhaps you might try looking at the date before you post?, this thread is almost SEVEN YEARS old.