My wife and I just got back from this event, held in Ellensburg at the Iron Horse pub on Main Street. There were (I think) 8 or 9 breweries represented, each pouring at least two beers. Our favorites were from breweries that we had not tried before: Orlison, from Airway Heights Spokane, who had a couple of very interesting lagers, and Wild Earth, from Roslyn that had 3 Belgians to try.
I'm going to have to check these out further.