Apple has put a link on their iTunes store where you can make donations using your iTunes account. 100% of the money goes to the Red Cross fund.
You can read about it here
http://www.macworld.com/news/2005/09...cane/index.php
If you have iTunes installed then here is the link. There is also a link on the iTunes store itself.
https://phobos.apple.com/WebObjects/...rityGiftWizard