Just hatched an idea with @Silberengel this morning.
TheForest relay has a pubkey now. Check it out: https://next-alexandria.gitcitadel.eu/events?id=npub1229y50ruvq9hjdxsjknh43gq4n9ef7h3h5hc4ezzrkg0q7kgg0tsv9a402
This is inspired by @Niel Liesmons's communikeys. If a user can have a NIP-05 address that verifies the npub and specifies that user's preferred relays, why can't a community do the same?
Your relay-based community can have a NIP-05 address that specifies which relays that community uses. We've got plans for this in #Alexandria, but other devs might find the idea useful as well.