I did that, but it apears to take me to a general donation site.
CNN has a list of links to charities.
Find one you like.
http://www.cnn.com/2004/WORLD/asiapcf/12/28/tsunami.aidsites/index.html
There's a pulldown menu on the webform labeled "Donor Designations" ... it offers the choices "Asian Earthquake and Tsunami" and "Catholic Relief Services programs around the world".