Amends the Internal Revenue Code to: (1) extend the first-time homebuyer tax credit through December 31, 2010; (2) extend eligibility for such credit through April 30, 2011, for taxpayers who enter into a binding contract for the purchase of a principal residence by December 31, 2010; and (3) extend eligibility for such credit through April 30, 2012, for military personnel and members of the Foreign Service and the intelligence community on qualified official extended duty outside the United States.