Universities pump out knowledge every day, and thankfully, many of the best universities and colleges are now starting to tape important lectures, if not full courses, and make them available as podcasts. We've spent the past few weeks finding the best podcast collections, both on iTunes and off. If you visit the University iTunes/Podcasts Collection (which can always be found in the Free Learning Portal on the right side of the page), you'll find sets of podcasts from 25 leading educational institutions, most in the US, but some outside. As the universe of educational podcasts grows, so will our list. So pay us a visit here and there, and keep your iPod poised to add new content.