I was recently asked by a coworker about local testing related organizations and I put together the following in my response. I thought it would be useful to capture the information in one spot so I can refer people to it in the future:

Seattle Area Software Quality Assurance Group
http://www.sasqag.org/

WSA Quality Assurance special interest group
http://www.wsa.org/events/sig/detail.asp?sigID=47

Seattle Eastside Area Software Process Improvement Network (SeaSpin)
http://www.seaspin.org/

American Society for Quality (ASQ) Seattle Section
http://www.asq-seattle.org/

IEEE Seattle Section
http://www.ieee-seattle.org/