Here is a map of many of the US organizations efforts in Haiti produced by Interaction http://haitiaidmap.org/  Interaction is a “A coalition of more than 160 humanitarian organizations working on disaster relief, refugee-assistance, and sustainable development programs worldwide.”

According to Interaction:

“InterAction’s mapping initiative provides detailed information on our members’ efforts to reduce poverty and alleviate human suffering in every part of the world. This pilot website showcases information on the response by our members and other agencies to the January 12 earthquake in Haiti, one of the current focus areas of our mapping efforts. Information on who is doing what where can be accessed by organization, cluster or sector, and location at the commune level”