Here’s a list of typographic/design related items one can buy to help:
http://jeansnow.net/2011/03/15/japan-earthquake-disaster-relief/

In particular, at http://wordshape.com/ 100% of all money generated by font sales are being sent to the Japanese Red Cross.

I will again mention http://www.sogojapan.org/ and http://www.typesociety.org/fontaid/

Someone knows of others?