On September 28 the Pew Forum on Religion & Public Life released the results of "U.S. Religious Knowledge Survey, a nationwide poll conducted from May 19 through June 6, 2010, among 3,412 Americans age 18 and older, on landlines and cell phones, in English and Spanish." The Executive summary is interesting enough on its own and if you want to get more details, just follow the links in the right column.