Preheat the oven to 400 and spray a muffin pan with non-stick spray. Sift together the flours, baking powder, salt, and cinnamon. In another bowl, mash the banana with the sugar, soymilk, apple sauce, and agave nectar.Pour the banana mixture into the flour mixture and stir just until combined. Add in the dates and walnuts, and pour into 12 muffin cups. Bake for 15-20 minutes, until a toothpick comes out clean. Serve to everyone who came running toward the aroma of fresh baked banana muffins!