There are many good sources of information on the web for succulents. Some of our favorite urls are listed here:
http://www.sedumphotos.net/main.php
http://ucanr.edu/sites/scmg/Top_Plants_Category_Parent/Succulents/
http://davesgarden.com/guides/articles/view/996/
http://davesgarden.com/guides/articles/view/1441/
http://sempervivoscope.voila.net/
http://translate.google.com/translate?hl=en&sl=de&u=http://www.semperhor...
http://www.xericworld.com/forums/home.php
http://www.agavaceae.com/agavaceae/agavhome_en.asp