Kent Peterson (who I think is now manager of BikeWorks) has written a post on his blog about the Seattle Century, and about his efforts to make sure the route is better marked this year.

He also added some clarifying comments about the money that BikeWorks sees from this event (see the comments field).

http://kentsbike.blogspot.com/2009/0...ry-course.html

Kent is a much more credible resource than I am; I'd consider Kent's comments a good endorsement of the ride.