It actually went pretty well.  The group of people attracted were (thankfully) significantly smaller than what the Facebook RSVP list had led us to worry about, and the people who showed up were highly engaged and seem likely to have a much higher retention rate than most editathons result in.  We created a handful of new articles about women who have played prominent roles in the cooperative movement (including some who had made incredibly significant contributions to fields of law that still effect our day to day lives) but had no previous mentions on Wikipedia, and improved another dozen or so articles above that.  None of the articles are astounding, but given that we really only had about two and a half hours to introduce people to wikicode and get crackin' I feel like the results were pretty impressive.  We had (thankfully) a lot of text sources on hand - otherwise a lot of the articles would've been impossible to write.