The South-East Asia Earthquake and Tsunami blog is a comprehensive blog offering detailed information and updates on the Asian disaster. It is notable because it's efforts are not focussed on just one nation. It's sister blog, Tsunamihelpneeded is the place to go if you need help or want to help out.
I am personally involved in a small way with Association for India's Development (AID), which swung in to action earlier on Sunday with volunteers on the ground in South India working with other local NGOs. AID has regular updates on its work on http://survivors.aidindia.org/ where you can contribute to AID's efforts. AID will remain active in the mid-term as well as long-term relief efforts. AID is an all volunteer effort and ranks among the top development agencies rated by Charity Navigator. The best way to contribute now is through monetary donations either through AID (alternatively here) or other NGOs listed in the Tsunamihelp blog.
UPDATE: Finally, in the spirit of TechPolicy, I must point towards GreenCarCongress, which is noting that even WITHOUT counting the damages from the Asian Tsunami disaster, 2004 was the year with the highest ever costs from natural disasters.