Having just returned from a week vacationing in Oregon from Astoria to Ashland for the Shakespeare Festival, we were reminded again of the state's beauty, and that brought memories of that quintessential Northwest musical group Oregon formed in 1970 by Ralph Towner, Paul McCandless, Glenn Moore and Collin Walcott. That's as good an excuse as any to play a couple of their songs on this show. Also this week, the Keith Henson Octet, Mark Taylor, and a couple of new artists appearing for the first