Google: "bondage knot tying"
http://www.restrainedtastes.com/ttt/links/bondtech.htm
There were some other good-looking links listed in the google results.
Also, The Seductive Art of Japanese Bondage by Midori is an excellent book that goes over what's pictured step by step. For the book:
http://www.amazon.com/exec/obidos/tg...books&n=507846 Her website (she's a photographer):
http://www.beautybound.com