As Congress & President Obama hammered out a debt deal over the past week, mortgage rates plunged -- hitting new lows in some instances. The 30-year fixed rate, usually the most popular choice for homebuyers, fell to 4.45% from 4.57% last week -- its lowest point since last November, according to the Mortgage Bankers Association. http://money.cnn.com/2011/08/03/real_estate/mortgage_rates_freefall/index.htm?iid=Lead