Viking 512MB Compact Flash Card - CF512M $15.79

Buy.com has the Viking 512MB Compact Flash Card - CF512M for $15.79

About one-third the size and 40% the thickness of a Type II PC card, CompactFlash cards offer complete PCMCIA-ATA functionality and compatibility. They are rugged, consume low power, are transportable, and can link numerous types of electronic devices, including digital cameras, digital music players, PDAs and more