This USB fingerprint reader by Hyundai costs just $25 at USB Geek. At that price, it may not give you confidence if you truly need a high level of security on your computer, but it could be one more barrier between you and the nosy person in the next cubicle or the family member who doesn't respect boundaries. In my house, that would be me; you'd think certain people would learn to change their passwords more often.

Via Gadgetizer.