There are numerous ways to donate to Haiti. Here are text-based donation options in the United States.
SMS text “HAITI” to 90999 to donate $10 to Red Cross relief efforts
SMS text “GIVE10” to 20222 to donate $10 to Direct Relief
Here are links to some organizations accepting donations:
I would add Doctors Without Borders to that list – http://doctorswithoutborders.org/