Calling All Podcast Nerds

So, I have a short story that I've written under the D.B. Jackson pseudonym, and I intend to make it available soon on the D.B. Jackson website as a .pdf (as I have other stories, as well as sample chapters from the books).  But I am also interested in possibly creating a podcast of me doing a reading of the story. I have a microphone that I use for music, and I know that I can record myself in Garage Band.  But I don't know what to do after that.  Do I have to put it up on iTunes as a podcast?  Can I simply make the file available as a download on the website, just as I would the .pdf?  Any feedback/advice would be most appreciated.