Freecom's credit card-sized flash drive hits 1GB
 

"What makes this flash drive stand out is the fact it fits in your wallet so easily with the form factor of a credit card and its pop-out USB connector, it’s almost impossible to lose. Even if you do lose it, your data is still safe with its data encryption. Finally, it’s waterproof down to 20 meters."

http://www.everythingusb.com/news/index/5592.htm