This is a list of aid organizations in Haiti that I recommend from my time there and my connections, feel free to share:
Baptist Haiti Mission
http://www.bhm.org/bhm/index.php Has a functioning hospital outside Port-au-Prince that is swamped!
Samaritan's Purse
http://www.samaritanspurse.org/ Franklin Graham's organization that just sent a team of doctors to BHM (there is a chance my father will join them in a few weeks through SP)
God's Littlest Angels
http://www.glahaiti.org/home An orphanage in Petionville that has made it through but expects an influx of new earthquake orphans in the coming days
Quisqueya Christian School
http://quisqueya.org/ My former school in Port-au-Prince. Campus miraculously sustained little damage so they are setting up makeshift hospitals and living quarters in the school buildings and on the soccer field. They are also collecting money to help with funerals and burial expenses for students and faculty that have died...
These are on the ground, established and helping people now and I know them not to be corrupt. If you feel led to help anyone of these, I know your money will do a lot of good....