[kardos]

Sounds somewhat like bittorrent.... as long as there is a "seed" then the content is available, but it falls apart when the last seeder disconnects.

... and it also sounds like usenet, but here everybody is a news server and they selectively host articles.

[chippy]

With bittorrent you could make a call in a public forum for more seeds for a file. And if people have a copy of that particular content they can reseed.

I wonder if this would also be possible in this case?

For example, my small server might serve 200 sites but I'll backup around 500 or so older ones somewhere else.