Making donations to help now in Japan (Save the Children, Red Cross, Doctors Without Borders, etc.):
Japan Disaster Relief: Where to Give
Check whether your employer has a matching program.
My favorite: the Donate Funds page of redcross.org. You can select where your donation goes, including Japan Earthquake and Pacific Tsunami, North Africa and Middle East unrest, etc.
Thank you to all the organizations who are helping.
Merci. ありがとう. Di ou mèsi. Danke. 谢谢你. Gracias. شكرا Grazie.