SanDisk showcased a rather usual mp3 player at the Consumer Electronics Show this year. It is called the Sansa slotRadio, priced at around $100 and doesn’t have its own internal memory to store the music. Instead it relies on a partner in crime, the slotRadio music card that was specifically designed for the casual music connoisseur. The slotRadio cards hold all the music for the player, and to wet your appetites SanDisk gives you a card preloaded with