Some great suggestions here. Thanks.

As far as the tag situation is concerned there is an ongoing project to add these (and summaries), where we're asking for Community assistance. Check out https://hackerpublicradio.org/missing_summaries_and_tags.html for the current state, and how to send updates. All contributions are very welcome!

The idea of explicitly linking to related shows is an excellent one, though some database redesign and code changes might be desirable to improve tag parsing and searching.