In a large bowl combine all-purpose flour, whole wheat flour, oat flour, baking powder, brown sugar, baking soda, and salt. Make a well in center of flour mixture; set aside.
In a medium bowl combine milk, egg, oil, and orange peel. Add egg mixture to flour mixture all at once. Stir just until moistened (batter should be slightly lumpy).
Pour 2/3 to 1 cup batter onto grids of a preheated, lightly greased waffle baker (use a regular or Belgian waffle baker). Close lid quickly; do not open until done. Bake according to manufacturer's directions. When done, use a fork to lift waffle off grid. Repeat with the remaining batter.
For sauce, in a small saucepan heat marmalade until melted. Stir in berries; heat through. Spoon sauce over warm waffles.