San Juan 21 National http://www.sj21class.org/
San Juan 21 Harbor http://sanjuan21.net/ - Not taking comments anymore, but great reference.
San Juan 21 Fleets
Fleet 2 - Eastern Wa
Fleet 52 - Lewiston, ID/Clarkston, WA
Fleet 28 - Calgary Canada - http://members.shaw.ca/sjfleet28/
Fleet 29 - Florida - http://sanjuan21sailing.blogspot.com/
Fleet 38 - North Carolina - http://www.lnyc.org/content.aspx?page_id=22&club_id=716915&module_id=34718
Fleet 43 - Oregon - http://www.coosbayyachtclub.org/sanjuan2.htm
Directory of San Juan 21's
http://members.shaw.ca/sj1732/ - The national site listed about has copied this data and it should be updated more frequently going forward.
Road Warrior Series Regatta Links
Sail Lofts
http://www.pamlico-nc.com/InnerBanks.htm
Equipment and Spare Parts
SJSailboats (Steven Jensen)
Blairs Wind and Wood Boats (Randy Blair)