The Nerdster!
A demo / proof of concept / reference implmentation of the paradigm, works with the ONE-OF-US.NET phone app.
Identify yourself using your public key to use trusted content from your Point of View.
Sign in with a delegate key to publish your signed contributions.
Dime-a-dozen forum like web app to submit and rate links and facilitate following others.
Demonstrates and explains everything that's going on (shows statements, signaures, identity keys, delegate keys, identity network conflicts, signature verification, token computation, etc..)
Puny and weak, won't handle thousands of anything (people, posts) around you (but you can shift your PoV).
Purist: naked, fully open.