Here are some useful links from around the web about Brazilian Jiu Jitsu:
Wikipedia Page: http://en.wikipedia.org/wiki/Brazilian_Jiu-Jitsu
International Brazilian Jiu Jitsu Federation: http://www.ibjjf.org/
20 Fundamental Moves: http://smashpass.blogspot.co.uk/2007/05/20-fundamental-moves-of-jiu-jitsu.html
The Gracie Jiu Jitsu Academy: http://www.gracieacademy.com
Think there should be a link here that we haven't mentioned? Email us at firstname.lastname@example.org and we'll put it up if we like it!