Oscar's proposal lets apps post the metadata to relays to then be pulled down.
I'm working on zaps.podtards.com that post to nostr:npub1k34lqqeqa90e269gtw4r5z3h0hgejj9hnf8lpkmc2jzq5tl2ru8qqkwhjf.
Works with Alby since the addresses in the feeds are keysend but I'm working on adding other stuff to help the 2.0 devs see this in action.