Asia and India got smashed. 76,000+ dead. The Earth's rotation sped up by 3 microseconds. Tectonic plates moved by 98 feet (they usually move about 1cm/year, I think). This was a big deal.

Slashdot has more of the technical news.

Google has set up a tsunami help page.

As has Amazon.

CNN has a clickable list of links to places you can donate.

I'm pretty sure the Red Cross has need of donations too, but their site seems slammed at the moment.

There's also a tsunami help blog.

Help out.