In a comment below, PeerCentered blogger Michelle notes that people might struggle with the technology of making an audio segment. While I think that would be the case if folks are trying to do it on the computer (although programs like GarageBand for Macs make it really easy), folks who want to participate could produce audio segments using older technology such as tape recorders. I can easily digitize any audio files on tapes or CDs; these segments would then be incorporated into the PeerCentered podcast envelope (if you will). I would then distribute the MP3 file on the same server that hosts the PeerCentered blog for syndication. Folks could then either use a web page interface or their favorite podcast listening software (such as iTunes) to listen to the podcast. Folks don't necessarily have to worry about the technological end of all this, in other words.
I'm going to make a page for submissions etc. I've also got a very rough "pilot" of a podcast that I might make public at some point. Basically it is a call for submissions in podcast form.