Linkshttp://mamba.bio.uci.edu/~pjbryant/biodiv/index.htm If it is organic and is found in Orange County, you can likely find an excellent photos of it on Peter Bryant's website. Of course, you will want to start with the spider page.
http://bugguide.net/node/view/15740 If you already know the scientific name of the critter you are interested in, plug that name into BugGuide and you may be treated to additional images.
http://www.ocf.berkeley.edu/%7Estevelew/soc Here you can find a list of most of the spiders known from California. It was first compiled by Steve Johnson in 1979, then modified by Don Boe in 1989 and then digitized by Steve Lew in 2004.
http://spiders.ucr.edu Worried about dangerous spiders? Get real and relax by going to Rick Vetter's authoritative website. No, the person you know in California that claims to have been bitten by a brown recluse is wrong. I know, "but the doctor said ………….".
http://www.americanarachnology.org// The American Arachnological Society has been around since the early 1970s. The purpose, as stated on its webpage is: "to further the study of Arachnids, foster closer cooperation and understanding between amateur and professional arachnologists, and to publish the Journal of Arachnology".