General Information on Eating Disorders
FamilyDoctor.org provides a general overview of the symptoms, causes, treatment, and complications of eating disorders.
This site is directed at parents, kids, and teens suffering from eating disorder symptoms or experiencing body image distortions. There are several sections with help for parents and also content geared toward helping kids develop positive body image.
This wikipedia article gives a good description of causes, symptoms, treatment, and research on eating disorders. It also discusses comorbid disorders and related eating issues such as Night Eating Disorder, Orthorexia, and Pica.