No one. Remember the big list of cool blogs that were generated off HN a couple weeks ago? That's one curated dataset. People can start their own curated databa

No one. Remember the big list of cool blogs that were generated off HN a couple weeks ago? That's one curated dataset. People can start their own curated databases and then see if others find them useful. Big ones become well-known, like big libraries. Small ones might become known for having the best resources for niche subjects.