Related link: http://loaf.cantbedone.org/
I like LOAF
LOAF is a simple extension to email that lets you append your entire address book to outgoing mail message without compromising your privacy. Correspondents can use this information to prioritize their mail, and learn more about their social networks. The LOAF home page is at http://loaf.cantbedone.org.
Why do I like LOAF?
It answers a question that will become more and more vital as details of our life are increasingly digitized: how do you share these details without losing your privacy? It’s not clear to me how many data types the Bloom Filters could be extended to, but as a proof-of-concept I think it’s great.
Do you know of other examples of user controlled, autogenerated social networking?