There are many organizations that have been taking donations to help with disaster relief in Haiti right now. If you are looking for some place to donate to I recommend donating to Partners in Health who provide health care options to the poor. Even before the disaster happened Partners in Health was helping the poor in Haiti obtain health care and you can be sure that they will be there after many organization have left.
Here is a direct link to the donation page
There are lots of great organizations out there so please, even if you don’t donate to PiH do donate somewhere.