If you are talking about an
xD-Picture card, you were told correctly. Smartmedia and xD are not the same, and although you can supposedly buy adapters that allow them to be used interchangeably, I've never heard of anyone trying this with an eBookwise 1150. Even if it did work, I would think an adapter sticking out the side would make the reader rather clunky. Your best bet is to get the card at 250 Coupe's link for $40, or try to snag one on EBay for $25-$30.
Bottom line, if it just says SmartMedia, you should be okay. If it says xD anywhere, it's not the right kind.