As an active hoarder I think there is problem with "6. Distribution: Packaging it up in torrents, announcing it somewhere, getting people to spread it.". I miss a p2p application with torrent packaging and Kademlia like per-file advertising and discovery, where I could point it to my hefty NAS directory of random things and they could be wired to released torrents. This way we could make torrents live much longer, ev…
But why? The current Kademlia implementation built in eMule/aMule does exactly this. Primary data advertised is file name string, there is also a support for several meta fields. Transfer proto sucks, but I don't think it really matters in the case of ultra-rare content.
I've dreamed of federated meta-client which mixes all available p2p networks in a wild and can download missing torrent part from eMule or Soulseek.