Went to the MENF in Puyallup, WA in June and enjoyed every bit of it. I paid for the full weekend ticket at the gate and felt it was worth every penny. The schedule was jam packed with break-out sessions, demonstrations, keynote speakers and a bunch of awesome vendors (don't forget the book table too).
Permaculture was pretty well represented. In fact, I was able to purchase my first two black locust trees and rosa rugosa (and hauled 'em all the way back to Montana) from one of the break-out presenters (Shambala Permaculture Farm, Camano Island, WA).
KUDOS to Mother Earth for putting on such a well organized informative event.
The only thing missing was the Duke of Permaculture - Paul Wheaton. Paul's people need to "call" ME's people and arrange Paul's keynote for next year's fairs. Perhaps some of the squires of permaculture from the Duke's laboratory, project or basecamp could teach breakout sessions and/or man a booth.