I love the spirit behind this idea, and Threadless for being a part of the solution to this devastating situation.
I do have to say that the image is completely obscure and uncommunicative to other people who see the shirt, unless they happen to take the time to read the words and understand Creole. So basically, not a lot of people.
So the fundraising effort is great. But as a public outreach tool it kind of doesn't do much.
Something in English on the shirt, even on the back, might make this more helpful.