The Paleolithic Diet Page - a great site containing most (if not all) hunter-gatherer diet web sites.
Bodyweight Exercise Board - friendly forum to discuss bodyweight exercises.
United States National Library of Medicine
Hardin Meta Directory - A comprehensive database of medical sites - from the University of Iowa
Golden Hour Medical Information - A great medical site with tons of free info, journals, books, and links.
The Dana Farber Cancer Institute - providing quality care adult and children with cancer.