The Alternative Horse
The Site For Hippy Horses Everywhere
Links
Yahoo Treeless Saddle Message Board
Galadriel's Website for saddle fitting and lots of other useful/interesting stuff
Newrider's Natural Horsemanship forum
Intelligent Horsemanship Discussion Group
Enlightened Equitation Discussion Group
Nagtrader Forum for all things natural/alternative
Treeless saddles currently on UK Ebay
Bitless bridles currently on UK Ebay
A Diary of a bitless user. She also has links to other bitless sites including CAMCARB (CAMpaign for the right to Compete and Ride Bitless)
The Saddlechariot for all you alternative drivers! 
Any more links you would like me to add, please Contact Me