iTunes on Campus
Alongside iTunes 4.5, Apple also appears to be promoting iTunes to educational institutions with iTunes on Campus.
Napster has recently seen some sucess in providing volume licensing to several colleges. Napster's unlimited subscription service allows them to accomplish this -- limiting access to music for the duration of the subscription.
iTunes on Campus does not provide a similar service and appears to be more of a marketing effort with permission for institutions to distribute the iTunes software:
This license agreement will allow you to distribute iTunes as a download from within your campus network or through individual CDs that you create. As a part of this program, Apple will also provide to you the creative artwork (for newspaper ads and flyers) about iTunes that you can use to tell students about iTunes.