I think a web ring combined with some kind of web of trust style system would be nice. Ideally they could be both centralized where an initial creator holds the keys to what's allowed and decentralized where it just sort of exists. I haven't quite been able to sketch out a reasonable way to keep sites persistent and consistent except DNS records, though. DNS of course making it hard or impossible for smaller and less tech-savvy creators while also having it's own issues regardless.

I'm a big web ring person though so I might be biased and trying to use a hammer in place of a screwdriver.