Here are some links that printmakers and print collectors will find interesting

Arts Council of Sonoma County - Art Trails, promoting visual, musical and theater arts
Artists Resources - Supporting the visual arts in Sonoma County, CA
Sebastopol Center for the Arts - A grassroots, nonprofit arts center in Sebastopol CA
Art at the Source - West Sonoma County open studios, May 31-Jun1 and June 7-8
Marin Arts Council - Promoting the arts in Marin County, CA
California Society of Printmakers -membership organization in California
Woman made Gallery - a professional on-line artists' registry to promote art by women
World Printmakers - Contemporary Fine-Art Prints and Printmakers from Round the Globe
Printmakers.info - print exchanges, workshops
Printmakers web ring -
Monoprints - a good link page with resources
WetCanvas - forums, gallery, technique, theory
Washington Printmakers - Washington DC gallery of contemporary fine art prints
Art Promote - a directory of artists
Women's Studio Workshop - printmaking, ceramics, photography, and book arts
MTSU Printmaking links - Mid Tennessee State University's massive printmaking links
The Painters Keys - Directory of artists from around the world, twice weekly newsletter