In a large bowl, cream together the butter and cream cheese. Add the vanilla and confectioners' sugar and beat until the mixture forms a ball. With a spoon, stir in the coconut. Roll the mixture between your hands to form small potato-shaped candies, or roll into small balls. Place the cinnamon in a shallow dish. Roll the balls in the cinnamon, then place on a cookie sheet, cover, and chill for about 1 hour, until firm. Note: Make sure to use regular cream cheese, not a whipped or reduced-fat type. And if you prefer "dirtier potatoes," roll the candies a second time in additional cinnamon after they've chilled.