The XD memory system was developed by olympus and fuji, which means that the fuji card is compatable in an olympus camera(I have a 3.2 megapixel camera). However the fuji card is £20 cheaper than the olympus card, the only difference in the cards being a lack of a panoramic facility on the fuji card (don't think this function is similar to the panoramic function on an APS camera, it involves 'stiching' photos together) which if I ever want to use I will use the 16mb olympus card that came with the camera.
With this card you can take from 326 photos on the default setting (3.2 megapixels) to a staggering 1598! photos on the lowest resolution setting all on a card the size of a thumbnail.
Worth every penny.