"Much of the financial support for earthquake-stricken Haiti has a high-tech source — the text message. From $10 donations to the Red Cross (text HAITI to 90999), the Clinton Foundation’s Haiti Relief Fund (text HAITI to 20222), and Doctors Without Borders (text DOB to 90999), cell-phone philanthropy has pulled in millions of dollars. We’ll talk about the mechanics of the text-message-donation trend."
From http://www.sciencefriday.com/program/archives/201001221