If you plan to donate to Tsunami Relief, be sure that you’re donating to a reputable charity organization. Your goodwill can quickly be invalidated by putting your assistance into the wrong hands. You can check Give.org or the American Institute of Philanthropy.
Try to choose experienced orgranizations that puts majority of the donations toward relief, and not ‘management’ costs, padding the pockets of a few people in charge. One reputable organization is the Catholic Relief Services. I personally trust a faith based organization to provide more complete and full relief per dollar, over any other organizaiton.