APDT - Association of Pet Dog Trainers
Dogwise - great source for dog books/training equipment
Dogstardaily- dog training/behavior info.
Kim Brophey's Tedx Talk- The Problem with Treating a Dog like a Pet.
Maggie's suggested reading list
Anything by these authors:
Jean Donaldson (author of The Culture Clash)
Dr. Ian Dunbar
Pat B Miller, CPDT-KA
Patricia B McConnell, Ph.D. (and McConnell/London)
Books dealing with specific issues:
Living with Kids and Dogs by Colleen Pelar
Total Recall by Pippa Mattinson