Last week my roommate Paul went mountain biking in Bend, Oregon. On their trip they met this guy Jeff. Enamoured with his bike, Paul took a few pictures and talked with him some. Guy said it was an old prototype and was out for a spin.
It was only later that they thought that Jeff was possibly Jeff Jones of www.jonesbikes.com.
EDIT: Turns out it wasn't JJ. Just someone who built a fork exactly like Jones is known for.
Interesting point of note - he told Paul that this needed to have a load on the front or it to feel right, and in fact his load was this and 2 front panniers. Hard to say but points to a low-trail setup.
http://www.flickr.com/photos/tehschkott/5972840129/