Although I didn't think about it at the time, I think it would be fascinating to be able to reference specific documents, videos, artifacts, etc. while listening to the story. I hope a recommendation feature is in the pipeline. I think it would be interesting to find new podcasts based on the number and quality of supporting documents, show notes, etc. Perhaps something as simple as a top list of what your current users are getting the most value out of would be a great place to start.
Will certainly be giving this a try -- fantastic work!