USBCard from Freecom
Freecom has released a USB flash drive that comes in a credit card form factor, and this time it is extremely skinny, touted by Freecom themselves to be the slimmest USB flash memory device in the world. While nobody has disputed that claim yet, you can be sure that it will fit into any wallet gracefully without adding in unnecessary bulk. Each of these cards come with a USB connector that clicks inside the card when not in use, boasting password protection and encryption software. Strange to see Freecom manufacture 256MB versions of these, although you can always pick up the largest of the lot (4GB) for 69.99 Euros.
See also freshly baked USB Drives