For opportunities at UW:
Society for Ecological Restoration- University of Washington; http://students.washington.edu/seruw/
University of Washington Restoration Ecology Network: http://depts.washington.edu/uwren/
For local opportunities to volunteer in Seattle area:
Adopt-A-Stream; http://www.streamkeeper.org/aasf/Volunteer_Ops.html
EarthCorps; http://www.earthcorps.org/volunteer.php
Green Seattle Partnerships; http://greenseattle.org/events
For current information about the field and a network to active restorationists:
The Society for Ecological Restoration International (SER); http://www.ser.org