You must have already been using Finger printing logins which have been included in many Notebooks as secure login feature. So how about facial recognition login?
Check out BananaSecurityAll you need is the software and a webcam. BananaScreen is fun and easy solution to lock and unlock your computer using only your face. It locks when you move away from it, and, when you return, BananaScreen unlocks the PC in less time than it would take you to enter a password.
With a simple webcam, facial features are captured to build a statistical representation of the face. No picture is stored on your harddrive (or anywhere else) but only your face model (binary format). You have to create your face model first to use it. At present supports Windows XP and Windows2000. May or may not work with Vista.
Its still under beta.
So those having webcam can try it out, just for fun!