Cambridge Center for Behavioral Studies (Autism & ABA)
http://www.behavior.org/autism/

Journal of Early and Intensive Behavior Intervention
http://www.jeibi.com/

Association for Behavior Analysis International
http://www.abainternational.org/

Autism Society of America
http://www.autism-society.org/site/PageServer

Autism Speaks & Cure Autism Now Foundation
(preview videos of typical children vs children with ASD)
http://www.autismspeaks.org/

Behavior Analyst Certification Board
http://www.bacb.com/

The Siblings Support Project
http://www.siblingsupport.org/

UCSB - Koegel Autism Center
Pivotal Response Treatment
http://www.education.ucsb.edu/autism/index.html

Listed below are some websites where you may find additional autism related resources:

Autism Foundation of the Carolinas (serving Charlotte and surrounding areas)
http://autismcarolinas.org/index.html

North Carolina Autism Society of America
http://www.autismsociety-nc.org/

Support Works
http://www.supportworks.org/cat767.htm