HealingWell.com
Find resources on diseases, disorders and chronic illness, including medical news, information, articles, community message forums and chat rooms, email, books, newsletter, directory of related web sites and more.
http://www.healingwell.com/

HealthBoards.com
Offering discussions of numerous health topics including allergies, cancer, diabetes, heart disease, exercise, attention deficit disorder, diet, and nutrition.
http://www.healthboards.com/