In a large bowl, combine the flour, sugar, baking powder, cinnamon, salt, baking soda and nutmeg. Cut in butter until mixture resembles coarse crumbs. Stir in pumpkin and buttermilk just until moistened. Stir in walnuts.
Turn dough onto a lightly floured surface; knead 8-10 times. Pat or roll out to 1/2-in. thickness; cut with a floured 3-1/4-in. witches' hat biscuit cutter. Place 1 in. apart on a greased baking sheet. Bake at 425° for 8-12 minutes or until golden brown.
Meanwhile, in a small bowl, combine the honey butter ingredients. Serve with warm biscuits.