I have not seen anything anywhere that presents the catastrophic damage caused by the tsunami as clearly as these photos. My brother sent me the link, which was set up by a cartographer. The linked web site shows photos of several of the areas that were devastated. They have been geo-referenced so you can compare the "before" and "after" of the same area with the click of a button. If you're like me, when you see these photos, words will fail you.
You can contribute to WorldVision's tsunami relief via CaptainsQuarters or by calling 888-562-4453.