Links to various resources on Chaos Magic.

http://www.chaosmatrix.org/ - Chaos Matrix. Compository of articles on Chaos Magic
http://www.specularium.org/ - Specularium. Peter Carroll's personal site with articles by him on magic and physics.
http://www.philhine.org.uk/ - Phil Hine's site with articles and resources.
http://www.grant-morrison.com/mag.htm - Pop Magic! A series of basic how-to's on Chaos Magic by the creator of the Invisibles comic series.