SDOT’s updated Seattle Transit Plan
Updated as of November 7, 2005 – http://www.cityofseattle.net/transportation/transitnetwork.htm
This has some great info for transit diehards. Maps, graphs, tables. You name it! 
Key interesting stuff for me was the focus on the Urban Village transit connections and the service levels they hope to provide on some of these corridors as early as 2007!
