Tectonic has posted an article indicating that Jabber founder, Jeremie Miller, is joining the Wiki Search project. Miller is known for founding the open instant messating service, Jabber, and for the Extensible Messaging and Presence Protocol (XMPP).
Tectonic further indicates that "Miller hopes to combine the transparency and power of an open protocol with the efficiency of a user-editable search experience."
Personally, I am still a bit skeptical about the concept of purely human powered search. Don't get me wrong, sites such as del.icio.us provide a great experience for a wide range of types of searches, so I see plenty of room for the success of social search.
So, I would expect that a human powered search engine may do many things very well. I just think that there are also many things that algorithmic search does (and will do) better. But hey, I have been wrong before ...