@mapkyca nice brainstorming, loving the idea of #microformats2 key discovery for private content! (I publish a link to my PGP key on my homepage, if you want to test it out :)

Have you had a look at PuSH v0.4? It’s way simpler than old PuSH and is no longer strongly tied to RSS/ATOM content.

Note also that the “argh my little site got popular and is dying” thing can be solved even with your simpler system, by making the endpoint an external service. Woo hypermedia discovery over well-known URLs!