Podcasting In The Classroom

Any podcasters out there?  I am interested in podcasting in the classroom.  I bought a nice microphone a couple of years ago and downloaded a free program called Audacity to mix with.  Works well and we have used it in the classroom with some success.  The problem is turning it into an actual podcast.  What we have done in the past is record it and mix it and I stick it on the schools website and if you know the site, the students can go and click a play button and listen to it.  I want to make an actual podcast that people can subscribe to and download to their mp3 players.  I need to learn how that works.  Like I said, I can make the recording and get it like I want.  What I really need to learn is how to get a rss feed (not sure if that is the right terminlology) and how to get it set up for downloading.  Anybody out there that can help?