With the discussion of bulk flour sources, I picked up some AP flour and Bread flour in 25 pound bags at a local Sam's Club.  The brand is Bakers and Chefs and it is milled by ConAgra.  I contacted ConAgra to find out the percentage of protein of each.  The AP flour has a protein percentage of 11% and the Bread flour is 12%.  The prices were $6.83 for 25 pounds of AP flour and $6.87 for 25 pounds of Bread flour.  I've been baking with them for about 6 weeks now and have been pleased with the results particularly at those prices.  Unfortunately for some, they are only available in bleached form.