Preheat oven to 375°. In a large bowl, combine flours, sugar, baking powder, baking soda, salt and nutmeg. In another bowl, beat eggs, buttermilk and oil. Stir into dry ingredients just until moistened. Fold in blueberries., Fill greased or paper-lined muffin cups three-fourths full. Bake until a toothpick comes out clean, 18-20 minutes. Cool 5 minutes before removing from pans to wire racks. Serve warm.