Teachers College has an iTunes University site hosted by Apple Computer.  iTunes U for TC

This site has both a public and a private (by authentication only) face, so publically recorded events can be seen by the world, and class content is made available only to those registered or instructing the class.

• How do I access TC iTunes?
• Will I have to pay to access TC on iTunes U?
• Is TC’s content part of the iTunes Music Store?
• Is the TC on iTunes content under copyright protection?