Wineries and Vineyards in the area and beyond...
General info and overview: www.winecountry.com
Sonoma wineries: find listings and maps at www.wineroad.com and www.sonoma.com and www.sonomavalley.com
Check out the Farmhouse Inn Winery Partners in the Russian River Valley
Napa wineries: www.napavalley.com (with ~400 wineries packed into that tiny valley try to avoid the Napa Valley on weekends)
Mendocino County wineries: www.mendocino.winecountry.com and www.mendowine.com