I've got one of these 8GB USB watches, paid about $20 for it:
Currently it's storing about 90% of all my Bitcoin private keys on it (encrypted file in an encrypted container), as well as a custom live Linux distribution, so I have access to my funds wherever I can find a laptop to boot from.
So, I guess, technically, my watch is valued at many thousands of dollars.
Seeing as Bitcoins are just 1s & 0s, I'd like to know if you guys have any nifty ways in which you store yours?