Skiing Forums (were Jon's username is Spyderjon)
snowHeads  
http://www.tetongravity.com 
http://www.epicski.com (see the Tuning & Maintenance section)

Ski Tests:
http://www.realskiers.com

Skiing Instruction in America:
http://www.skimartinbell.com     
http://www.epicskiacademy.com
 
Boot Fitting, Alignment & Balancing in Europe:
Stephen Rooke at Footworks, Chamonix
Tel: 04 50 53 46 52

Boot Fitting, Alignment & Balancing in America:
http://www.snowind.com
http://www.superiorski.com

Boot Fitting, Alignment & Balancing in Canada:
http://www.lous.ca

Campbell Balancer Analysis (for fore/aft positioning of bindings):
http://www.jonsskituning.co.uk/content/view/33/48/
http://www.realskiers.com
http://www.superiorski.com
http://www.lous.ca