Mercy Corps is consistently rated one of Amercia's top 100 charities. They also get A+ ratings as a humanitarian organization.
And as of now, they are the ONLY group working with the survivors of the tsunamis that is employing the people of the countries to help clear debris, start to rebuild. There was an article in the Wall Street Journal about the benefits of helping the survivors feel useful, how it helps them deal with the trauma by working together and also , of course, to pay them which helps to jumpstart the economy.