So I have an archive of about 200 mp3s, which we add to on a weekly basis that I'd like to add an RSS feed for. I'd like to have iTunes integration (though that's not really a requirement). What solutions do you guys recommend that are free/cheap? I currently store metadata in a DB, should I move to xml or use both? I'm working with PHP, but am open to using other languages if they'll get the job done.