[halcyoncmdr]

There are fingerprint scanners on other devices such as laptops. However the touchscreen on the Mogul cannot detect anything except the position of a touch. It is the same on the Treos. There is no way for the screen to tell what the finger looks like, or even that it is a finger. They can only detect the position of "something" touching the screen, whether it be finger, stylus, pen, etc.