I remember reading about those in a magazine, many many years ago. Unfortunately, another disadvantage is that SmartMedia itself is an obsolete format, and IIRC it maxes out at 128MB, correct? (in comparison, my LC III came with a 80MB HDD back in the day, and many older Macs came with 160+MB drives, so really apart from the solid state-ness, you're not really gaining anything)