The Freecom USB Card Pro. It’s flat. Very flat. And shiny. And silver. And $269.00 for 512MB of storage.

‘Award winning credit card-sized storage device Storage Capacity: 512 MB High-quality magnesium alloy Compatible with PCs, notebooks, Macs and Linux Ultra-fast data transfer rates: 14 MB/s (read)/ 11 MB/s (write) Fully USB 2.0 compliant; can also be connected to USB 1.1 Flexible, integrated cable to use the USBCard in any orientation’