A way to donate $10 with a simple text message from your cell phone. ETA This donation goes to the Red Cross. You will get a text message in response asking you to verify that you do wish to donate.
A donation link for Doctors Without Borders where you can donate as little as $1.
From help_haiti a fandom auction of epic proportions. Make a donation, get some art or request a fic. You can sign up to offer your own services as well.