Chowhounds share their favorite (other) sites for finding great recipes:
Food magazine–based sites Epicurious (recipes from Bon Appétit and Gourmet), and MyRecipes (recipes from Sunset, Southern Living, Cooking Light, Coastal Living, Cottage Living, and Health) are popular gold mines.
For general recipe sites, RecipeZaar is lauded for its awesome search capabilities and useful comments and ratings.
Williams-Sonoma has reliably good recipes.
And King Arthur Flour has a treasure trove of baking recipes of all kinds.
Board Link: Favorite online recipe collection