Challenge Butter, Dublin, Calif., expanded its line beyond butter with four new cream cheese items. The cream cheese comes in regular 8-ounce blocks, spreadable 8-ounce tubs, 8-ounce Neufchatel blocks and whipped cream cheese in 8-ounce tubs; each for a suggested retail price of $2.49.  The regular cream cheese contains 9 grams of protein per 2 tablespoons; the Neufchatel contains 6 grams of protein per the same serving.