This has been on my mind since I asked that question, because extending my blog software with support for publications is still my goal. However, after observing and dabbling in Nostr dev and specs for about a year now, I'm more convinced than before that relays are the wrong abstraction for publications. I haven't engaged in more discussion yet, because I was both trying to solidify my understanding of why, as well as come up with and implement what I think is a decent event-based solution. That said, I think relays could be useful for indexing/curating publications themselves (while users should also be able to index/curate them separate from relays). Either way, demo and article incoming (soon-ish).