http://www.pokerpartynw.com is a pretty new site aimed at WA/OR players and games. Its pretty small at this point, but has a good setup and potential for growth (the guys who run it also run
http://www.lanpartynw.com).
There's a Federal Way game thread there but it sounds lower stakes than you're looking for.
Teckor21 runs a .25/.50 game every other Tuesday up in Burlington, but that's probably farther than you want to drive.
If your interested in hosting you should throw up a thread there. I'd probably be willing to drive down from Everett if the time slot works out for me.