As everyone is now aware, Mt Gox has declared bankruptcy. As what appears to be the very last thing they did, Mt Gox accepted my $35 and fulfilled my special Mt Gox Yubikey. Having just arrived in the mail, I can now rest assured that my Mt Gox account, if it still existed, and all those bitcoins, if they weren't already stolen, would be safe and sound!
Unlike regular Yubikeys, Mt Gox ones are specially hardened. They are write-only and protected by a secret 48-bit access code (known only to Mt Gox). So, outside of making an interesting keychain, or framing it as a constant reminder to watch where I put my money, does anyone know of any interesting things I can do with the Yubikey? Reprogramming, because of the access code, seems to be out of the question, but maybe I can use it for some sort of cool non-cryptographically-secure authentication token?