Place reserved giblets in saucepan with 2 cups water; cover, and simmer 1-2 hours or until giblets are tender. Remove from broth, reserving 1 cup of broth. Chop giblets; set aside. Combine cornbread and bread cubes in a large mixing bowl; add 1/4 cup water, salt and pepper. Set aside. Melt butter in a large skillet; add sausage, celery, and onion. Saute 3 minutes. Cover, and cook an additional 30 minutes or until sausage is browned and vegetables are tender; stir frequently. Remove from heat; stir in bread mixture. Add reserved giblet broth and giblets, mixing well.
NOTE: 2 packages of Martha White Cornbread Mix, baked ==6 cups stuffing.