Hi everyone,
While RSS feeds for Howl are on the road map, I didn't want to wait. After a few weekends of development, I put together a web service to generate RSS feeds while we wait for the official feature.
It's available at https://howl-rss.128.io, is open source (reviewable by other people), and your Howl credentials never cross my server (they go through StageBloc, the same service Howl uses for memberships).