What's the difference between a Multimedia Card (MMC) and a San Disk
memory card?

My DV recorder came with a MMC card for still images, but its only a
measly 16MB, so I want to buy a larger card. My digital camera takes SD
cards that work in the DV camera, but the MMC won't work in the digital
camera. So I think I'd like to buy a couple of 1GB SD cards that can be
interchanged with the two cameras. Is there any reason I should not
use a SD card instead of a MMC in the DV camera?

--riverman