Seattle Tech Wiki should probably be on this list of local tech wikis.
It mostly targets tech startups, so a lot of entrepreneural focus,
including a lot of blank pages in these areas they wanted to have filled
in. Still, some useful links on that site.
http://www.seattletechwiki.com/index.php?title=Home
It's sister site,
SeattleTechCalender.com, is very popular for event
exposure. Wikipedia Seattle should consider getting a recurring event
listing their monthly meeting on that site.