You could also make public servers do peer-to-peer discovery! Then if your server ever goes down, it would be enough for a single host to post the address of their server in the issues
I've had the idea for a while now to use torrent trackers as a server masterlist. Torrent trackers are already basically a way for computers to insert their IP into a list, so if you make up some fake torrent "announce hash" (I think that's the right name), then hardcode a few of the most popular open trackers, you can use the "peer list" from the tracker as a list of servers. Just haven't had a use case for it (yet).
