• The Cactus Explorers Club Journal – A Free On-line Journal
  http://www.cactusexplorers.org.uk/journal6.htm

• Cacti Guide.com
  http://cactiguide.com

• The Cactus and Succulent Plant Mall
  www.cactus-mall.com

• Chuck Everson Bookseller
  http://www.chuckeversonbookseller.com

• Dave’s Garden
  http://davesgarden.com

• Desert Tropicals
  www.desert-tropicals.com

• Garden Web
  http://forums.gardenweb.com/forums/cacti/

• The Prickly Palace
  (wholesale nursery, but VERY active in the Southern California succulent community)
  http://www.pricklypalace.com