I started to do a search on the WEB for CAM's and have got bored so
here's a start :-   mostly discrete CAM chip manufacturers

http://www.openskytech.com/ContentAddressableMemory.htm
http://www.music-ic.com/literature/files.html
http://www.qualitysemi.com/products/network.html
http://www.utmc.com/   search on their home page for CAM
http://www.netlogicmicro.com/
http://www.netlogicmicro.com/text/tech_support.html
http://www.hep.ucl.ac.uk/atlas/rob-in/cam-for-index.html

NB Music Semiconductor Inc is the big player ( pun!! ) for discrete CAM
chips and others second source them . The others ,however can have
different application notes . Also note that I don't include
Xilinx or Altera  'cause you can search for yourself  on :-
http://www.xilinx.com/search/sitex.htm or
http://www.altera.com/