http://www.velorambler.com/
http://www.socalcycling.com/
For some other great resources about Bicycling in San Diego go to:
http://www.sdcbc.org/ (San Diego County Bicycle Coalition)
http://www.sdbikecommuter.com/ (SD Bike Commuter)
http://www.sdbikeunion.org/ (SD Bike Union)
http://www.bikeed.org/ (Bicycle Traffic Skills)
http://www.bikesd.org/ (Bike San Diego)