Amends the Economic Stimulus Act of 2008 to extend through December 31, 2009: (1) the increased ceiling amount for mortgages purchased by either the Federal National Mortgage Association (Fannie Mae) or the Federal Home Loan Mortgage Corporation (Freddie Mac); and (2) the temporary loan limit increase for Federal Housing Administration (FHA)-insured mortgages in specified high-cost areas for which a borrower received credit approval.