"The U.S. Public Debt, commonly called the national debt or the gross federal debt, is the amount of money owed by the United States federal government. This does not include the money owed by states, corporations, or individuals." (Source: Wikipedia, "U.S. Public Debt")
Current debt as of 9 June 2005 is $7,799,659,687,041.37. (Source: Bureau of the Public Debt, "The Debt to the Penny")