An excellent report produced by Blogpulse:
An earthquake and tsunami devastated wide areas of Southern Asia on Dec. 26, 2004. As neighboring nations and relief agencies began organizing to help, so did another group of people: bloggers. Unlimited by geography and powered by easy blog-publishing tools, bloggers quickly sprang into action to provide information that was otherwise impossible or extremely difficult to find. In a remote part of the world, where traditional news crews wouldn't arrive for several days, bloggers provided some of the first eyewitness accounts, news of relief efforts, videos, still photographs, lists of victims and missing persons, and other helpful disaster aid and coordination information. View BlogPulse's analysis of tsunami-related coverage in the blogsphere.