First time Home Buyers - MUST ACT BEFORE April 30, 2010 to take advantage of the American Recovery and Reinvestment Act's $8,000 tax credit provision.
And a new tax credit of up to $6,500 is now available for qualified move-up/repeat (existing) home buyers purchasing a principal residence before April 30, 2010. This new credit does not have to be repaid. Details here.
(Note: as of June 1, 2009, this tax credit can be monetized to cover closing costs, buy down interest rates, or add to minimum down-payment.)