Military members, some members of Foreign Service serving outside the United States and some members of the intelligence community have an extra year to purchase a primary residence and qualify for the first time home buyer and repeat home buyer tax credit.
You must purchase by April 30th 2011 and close by June 30th 2011.
You or your spouse are eligible if you have served on a qualified official extended duty service outside the United States for at least 90 days during the period after December 31 2008 and ending before May 1st 2010.
In many cases the repayment requirement is waived.
You can read the full article at http://www.irs.gov/newsroom/article/0,,id=215594,00.html