From Sound Transit:
http://www.soundtransit.org/About-Sound-Transit/News-and-events/News-releases/New-Express-route-596.xml
Sound Transit will take over the operation of the shuttle between the Bonney Lake Park and Ride and the Sumner Sounder station. The current route, run by Pierce Transit, was going to be canceled due to budget cuts.
This is great news. With both the growth of the Bonney Lake area and the growth in use of the Sounder this route was heavily used. Furthermore the Sumner station has little parking, meaning that most commuters need to shuttle in anyway.
More: http://www.thenewstribune.com/2012/04/23/2117510/new-proposal-may-salvage-sumner.html
Ben