I don't think of digital audio spoken word content as digital radio. I think of it as audio content. As such I understand that audio content is not usually intended to be ephemeral and thus does not lend itself well to a news feed.
I believe that spoken word audio content could benefit from it's own focused technology and should abandon the existing borrowed technologies intended for news and music.
P.S. Yes... no call to action at this time, just food for thought.