Other
Find Biometrics, Global Identity Management
This site is geared more toward a consumer than a student, but it does list, describe, and in some cases compare each of the primary identification methods (fingerprints, iris recognition, voice, etc).
Other
The Biometric Consortium
This site provides a very comprehensive look at the current status of biometric systems. There is some information contained directly within the site, but the main feature is the numerous links to each of the different types of biometric...