This series of cute and colorful USB drives from the Japanese Solid Alliance website are made of silicone and shaped like dog bones. They would actually go quite well together with the Bone Wrist Support.
You simply open one end of the bone to gain access to the USB stick, then you can plug it into your commuter and transfer files back and forth.
The USB Dog Tag comes with a built-in 512MB memory and is available in five different colors. The price is set to 2 980 yen (about $25 USD).
Also make sure to check out the Gadgets for Dogs entry.