Academy of Nutrition & Dietetics, great articles here on nutrition written by registered dietitians.
Runners World, Nutrition & Weight Loss Tips for Runners
RunDisney, Nutrition & Marathon Training Tips
Healthy Aperture, collection of healthy recipes on the web
Athlete Eats blog on Healthy Aperture, my collection of sports performance tips & athlete recipes
Eating Well, healthy recipes and nutrition articles
Cooking Light, healthy recipes and nutrition articles and videos