"The Panasonic BMET100 Iris Recognition Camera includes Private ID Client Software for stand-alone PC protection software-PC Log-On, Folder & File locking, and more."
"Although primarily used for iris recognition, Authenticam can record video email messages and be used to participate in LANWAN and internet-based videoconferences."
More details at Panasonic UK.
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Another, albeit expensive, way not to bother those grey cells of yours with remembering passwords. "Primarily used for iris recognition?" eh? Well, I'd love to see someone use one of these to create the first "Iris Webcam" and broadcast their eyeball on the Internet.