Rain Catchers
http://www.raincatchers.org/home.htm
This is a long-term mission to Haiti that installs water systems on homes in order to provide the people a clean, reliable source of drinking water.
Missions In Haiti
http://missionsinhaiti.com/page/Earthquake-Disaster-Relief.aspx
They are collecting basic hygiene items such as toilet paper, soap, shampoo, toothpaste and deodorant and foodstuffs such as rice, dry beans, dried eggs, powdered milk, ramen noodles, Spam, cooking oil, etc.  You can drop off items at Tulsa New Holland, 11919 East Pine St.
American Red Cross
http://www.redcross.org/