Microsoft now has a number of fingerprint authentication devices so you can logon to your machines and web sites without using a password. While I'm in Seattle I'm going to pick up one of these devices. I plan on putting one on my Windows Media Centre PC so i don't have to use passwords to logon.
Check out the link!
I recently switched to our Fingerprint Reader from the Digital Persona model I'd been using, and I really like it. More information here: http://blogs.msdn.com/mswanson/archive/2004/12/03/274170.aspx