These articles and overviews are good sources for general information on autism and Asperger Syndrome.
What Is Autism
Autism Society of America
Your Child and Autism
American Academy of Family Physicians
Asperger Syndrome Fact Sheet
National Institute of Neurological Disorders and Stroke.
Mayo Clinic Children's Health Center
OASIS (Online Asperger Syndrome Information and Support)
An online educational resource from Barbara Kirby, author of the OASIS Guide to Asperger Syndrome, and the University of Delaware.