Encryption on the fly

Kontron's InfoGuardian is a USB 2.0 or FireWire aluminum hard drive enclosure that encrypts the data on the internal drive via DES or TDES ciphers, all locked down by a removable USB flash drive key. I'd like to see some performance numbers for the top-end 192bit encryption, since everything passing to and from the drive would have to be reprocessed. It's a nice looking case, too. Link