The name is the best thing about this tool.
It's a simple ruby program that maintains a local mirror of a set of podcasts. That just means downloading enclosures, and keeping a modified local copy of the feed, pointing at the locally mirrored data.
It's not super-clever or very efficient, but it does the job.
It doesn't have a daemon mode; run it using cron.
It doesn't serve pages; point apache at its output directory.