In a large bowl stir together all-purpose flour, whole wheat flour, oat flour, brown sugar, baking powder, baking soda, and salt. Make a well in center of flour mixture; set aside.
In a medium bowl combine milk, egg product, oil, and orange peel. Add egg mixture all at once to flour mixture. 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 remaining batter.
Meanwhille, heat marmalade in a small saucepan until melted. Add berries; heat through. Spoon over warm waffles.