Podcast Radar
Just a few days ago I stumbled upon the <podcast:location> element in the Podcasting 2.0 spec, and wondered whether anybody uses this.
Today, I found radar.rss.io on Hacker News, which is the first time I've seen the location element actually being used. The Podcast Radar allows you to find podcasts near you, or any location you select on a globe. I was surprised how many were produced near where I live. Hopefully, a feature like that will soon be added to one of the podcast directories.