Thanks to Doug Kaye for the link to David Sturges' blended learning course: MANA 3333: Digital Media for Management and Marketing (forgive the overly dramatic intro audio...) - the textbook is audio - a series of MP3 files for download to an iPod or whatnot.
It would be cool if David provided an RSS feed with enclosures, so students could just subscribe to that with iPodderX and have the audio pulled down when it's released, instead of having to keep visiting a page to see if there is new audio...