This seems to todays zeitgeist.

The Education Podcast Network

The Education Podcast Network is an effort to bring together into one place, the wide range of podcast programming that may be helpful to teachers looking for content to teach with and about, and to explore issues of teaching and learning in the 21st century.

And, if you have iTunes, go to

podcasts -> education -> higher education

to see lots of (mostly free) higher ed. podcasts!

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5. Princeton podcasts!