What does it take to provide podcasts?  I know a little bit about what it takes to create them, having played around with various kinds of little audio files.  I'm curious about what it takes to provide them to students (or anyone else, for that matter) on a regular basis.  Say I had a bunch of podcasts.  Say I didn't want to put them on iTunesU.  Is there software we could run on a media server that would allow students to check for new podcasts and download them to a mp3 device on a regular basis?