I just moved away from the PNW.
Most of the action is going on in Portland, lots of shows on a regular basis.
Cryptotropa and Le Voyeur down in Oly host noise gigs, though irregular. Check out
http://cultofdog.com/ for most shows in Oly. Sign up for his list too. Ya just missed it but Cascadian Yule in Oly is a killer experimental/bm/dark ambient night.
Hollow Earth Radio in Seattle are hosting the brunt of noise gigs up there. I am pretty sure they post shows to their site.
Tacoma had a few houses going, but I know at least one went down due to some neighbor drama.
IS doesn't play out a ton. Maybe 1 or 2 shows in WA last year?