"An individual's social security number is now considered confidential information. The University's use of it as a main identifier is no longer practical and may be considered by some to compromise its confidential nature." -- University President Graham B. Spanier discussing Penn State's new identification system
We are in the process of doing this also. I like to think I influenced this a little. Most of the people are so lazy that they just wanted to keep using SSN because it is easier.