Hi all,
I've written a simple tool in Python to re-podcast from an annex: recastex
Starting with the downloading podcasts page, I've got a number of podcasts on my laptop, but they were not really synced to my podcast app on my phone. Not a problem any longer.
The app uses the metadata associated with locally available files to generate feeds for each of your "subscribed" podcasts - and collects anything else you have (like individual files) into a catch-all feed.
It's designed with git-annex + limited network + privacy in mind separating the public internet queries from the things that can be done over git-annex.
(As the author of git-annex-metadata-gui said...) I hope these can be useful to someone other than myself.