Check out the Seattle Folklore Society page, and also Victory Music. Lots of good info there to start. And if you're a guitarist of any stripe, try to find a way to attend the Puget Sound Guitar Workshop (be sure to follow the link to biographies of the teachers) -- absolutely the best fun on six strings! (or twelve, or four, or eight, or five...) Enjoy!

Aloha,
Mark (ex-Seattleite--could you tell?)