THIS SHOP IS NOW CLOSED. SORRY.
I had Finn Hill Bikes tune up my bike. They did a great job and it was reasonably priced. I also did it during the busy season and there wasn't a waiting period. That was a big relief. The guys were cool and really just like bikes--no overzealous sales people.
The list their prices on their Web site:
Their shop is next to the QFC on Juanita drive.