Here at Cornell, we use Kerberos for our internal authentication (course websites, email, course add/drop, etc). There's a program called Just the Facts that allows you to access your personal information (courses, grades, financial aid info, etc) once authenticated. However, our tech department says that JTF and Kerberos in general doesn't work on Leopard (but works fine on 10.1-10.4). Why would this be?