At the moment, the only secular relief organization that indicates that they are on top of Haiti, and is a respected and effective organization, and so on and so forth, is Direct Relief International. Here is their web site.
UPDATE: If you are a US citizen and seek information on your relatives in Haiti, call this number: 888 407 4747
You’ll probably get a busy signal but keep trying.
If you know of any other secular organizations that are providing the opportunity to donate to help people in Haiti, please post them below.
Drs. without borders and the various UN groups are obvious cases, but so far their web sites don’t have a “help Haiti” link.