Internet Mental Health
A very useful site for child and adolescent psychiatrists by the Canadian psychiatrist Phillip Long. Though Long may be using it to create interest in his commercial site, he keeps the two well separated. Within the Disorders category, each childhood disorder (ADHD, Asperger's, autism, conduct disorder, oppositional defiant disorder, separation anxiety, Tourette's) includes categorised links to the PubMed literature on the topic.
Also provides many other useful links, such as guidelines, information for the public, and articles from the popular press.