If you're here in the States and trying to get info on family or friends who are in Haiti, you can call the State Department at 1-888-407-4747. The homepage indicates that you can donate to earthquake relief by texting 'HAITI' to 90999 and $10 will be donated towards the relief efforts.
I heard a woman being interviewed on the Rachel Maddow show say that on-the-ground estimates put the death toll at 100,000. Anyone who has even the most basic understanding of the pre-earthquake situation in Haiti knows that this is the LAST thing that needed to happen to this country.
Please say some prayers for the people of Haiti as they work to recover from this disaster.
UPDATE: You can also get more insight on the situation (pre-earthquake) via Wyclef Jean's non-profit, Yele Haiti.