Here are some links to sites that contain helpful information about buying or selling a home.
Recent News - info on the revised First Time Home Buyer's Tax Credit:
http://www.federalhousingtaxcredit.com/
More info about the 2009 First-Time Home Buyer Tax Credit:
http://www.realtor.org/home_buyers_and_sellers/2009_first_time_home_buyer_tax_credit?lid=ronav0019