NBCAAM: National Board of Certification for Animal Acupressure and Massage
Tellington Ttouch Guild To access the directory of practitioners
IAAMB: International Association of Animal Massage and Bodywork
And here are some links to additional info and resources:
Canis Bodyworks (formerly Chicago School of Canine Massage)
Tellington Ttouch: What is Tellington Ttouch?
Chirag Patel's Domesticated Manners - for all kinds of good information
How to Walk Your Adult Dog - fabulous suggestions here