Here are some great resources on dog training and information for dog trainers.

Dog Training:

Dr. P’s Dog Training: http://www.uwsp.edu/psych/dog/library.htm
Dog Training Guide: http://www.dogtrainingguide.com

Dog Trainers:

Association of Pet Dog Trainers: http://www.apdt.com

Dog Breed Information:

American Kennel Club: http://www.akc.org/
Animal & Pet Organizations:

Humane Society: http://www.humanesociety.org/