I think you are confusing Mb with Mac.
The minimum size Smart Media card you would want is 64 Megabites (Mb). It will hold 30 plus books.
You don't actually need a card at all in the 1150, it has 8Mb of onboard memory and will hold or 10 books. That said, you will need a card if you wish to migrate it to the ebookwise servers.
Look at http://www.jr.com/delkin-devices/pe/DEK_DDSMFLS2128/
for the card. Be aware that you may get a box of ten at this price. I did and I'm hoarding it!
Look at http://www.newegg.com/Product/Produc...82E16817422002
for a card reader. I don't know anything about this, I just searched around for it.
Another option is to email ebooktechnologies and ask them to send you a card with the migration files on it.