Here is an excerpt from a pretty good CNNMoney.com story on the subject:
The House on Thursday passed a contentious foreclosure-prevention package, which still faces a veto threat from the White House and an uncertain fate in the Senate.
In a 266-154 vote – with 39 Republicans voting in favor – lawmakers approved a proposal, sponsored by House Financial Services Chairman Barney Frank, D-Mass., to let the Federal Housing Administration (FHA) insure up to $300 billion in new loans over four years if lenders agree to reduce the mortgage principal.
To qualify, the lender would have to cut the debt to no more than 85% of a home’s current appraised value. If the FHA-refinanced loans went into default, the FHA would pay the lender the remaining principal owed.
While 1.4 million loans are likely to be eligible for such a program, the Congressional Budget Office estimates such a measure would end up insuring 500,000 borrowers. The CBO estimates the FHA expansion program would cost taxpayers $1.7 billion.