Related links and projects:
FeedFlipper, a web-service for turning iTunes-links into RSS-links
Web-iTunesU, a web-service for converting iTunesU pages for use in a browser.
jTunesU, a Java application for iTunesU access
Technical documentation on iTunesU
Online learning/school help:
http://coursera.org/ – a plethora of free information, currently you can enroll in courses, and browse for free.
http://ocw.mit.edu/ – more free courses
http://shop.oreilly.com/ – Numerous technology books and resources, free webcasts and books from time to time when you subscribe to their newsletter.
http://www.libimobiledevice.org – Useful if you ever need to move some file to/from an iPod/iPad/iPhone.
iosTransferGUI, a simple way to load files onto iPad without having to use the command-line ifuse and libimobiledevice: