Six months after a devastating earthquake struck Haiti, most governments that promised money to help rebuild the country have not delivered any funds at all. Donors promised $5.3 billion at an aid conference in March, about two months after the earthquake -- but less than 2 percent of that money has been handed over so far to the United Nations-backed body set up to handle it. Only four countries have paid anything at all: Brazil, Norway, Estonia and Australia. The United States pledged $1.15 billion. It has paid nothing, with the money tied up in the congressional appropriations process. Venezuela promised even more -- $1.32 billion. It has also paid nothing, although it has written off some of Haiti's debt. Altogether, about $506 million has been disbursed to Haiti since the donors' conference in March, said Jehane Sedky of the U.N. Development Program. That's about 9 percent of the money that was pledged. But about $200 million was money that had been in the pipeline for aid work before the earthquake, and about another $200 million went directly to the government of Haiti to help it get back on its feet, Sedky explained. That has left the commission with about $90 million in donations since the conference, Sedky said.