traditionalyogastudies.com
Reliable, insightful yoga teachings

kpjayi.org
Sri K. Pattabi Jois site... official Ashtanga

ashtangayogi.com
David Williams on the web

spiritseekerjourneys.com
Conscious Sailing Vessel

namarupa.org
Indian thought and form

theshala.com
Authentic yoga in nyc, retreats

iayt.org
International Association of Yoga Therapists

viniyoga.com
American Viniyoga Institute