Fingerprint sensors aren't exactly commonplace yet, but they're not really enough to set yourself apart from the competition either. That said, biometric protection is still a lovely feature to have, and it appears to be the primary selling point for the Mercury Data ES-SBD2 Bio Disk. There's no actual storage here - you'll have to supply your own 2.5-inch hard disk drive - but it does come with a fingerprint reader "to encrypt and protect your data." Let's just hope it comes cheap.