That is actualy giving some interesting ideas. I'm now thinking about permanent identities across websites, as well as some "rooms" where you can enter to have a chat...

I'll need to think this through. I don;t want to overcomplicate the project...Part of charm is the simplicity.

An identity doesn't need to be more than a public gpg key. Anything else is just what they (or anyone, really) say about themselves relative to a given subject.