http://www.arrl.org/ARRL is the national membership association for Amateur Radio operators.
http://www.orange-arrl.org/web/The American Radio Relay League Serving Amateur Radio in the Southern California Counties of Inyo, Orange, Riverside and San Bernardino. Orange Section,the most colorful and juiciest Section in the Nation!
http://73s.org/ 73s, the social network for ham radio operators!
http://www.rivcoraces.org/The Riverside County, California Radio Amateur Civil Emergency Service (RACES)
http://blacksparrowmedia.com/resonantfrequency/Resonant Frequency: The amateur radio podcast was created to help get
information on amateur radio out to the new ham and the ham that wants
to find out about different aspects of the hobby they are thinking
about trying out.
EMI replaced its Incident Command System (ICS) curricula with courses that meet the requirements specified in the National Incident Management System (NIMS).
http://4x4ham.ning.com/ Off Road Enthusiasts that use Amateur Radio for recreation and public service.