We considered this too after the Haiti earthquake. Well, considered theortically, since we aren't allowed to adopt as a couple in QLD.

We found that there are special conditions in place to make sure that the situation doesn't get taken advantage of (ie. people trying to 'sell' orphans, or claim that they are their own children because the parents have died and then try to 'sell' them in adoptions etc). Because of that, you still have to go through Australian channels, so that everything is above board and the children are legitimately orphans or put up for adoption byt their own family.

They also prefer not to process adoption of orphans after natural diasters, because so many things are uncertain, and they want to make sure there aren't any family willing to take care of the children before they mvoe them away from their community and culture etc.

But look into it, because I might be wrong, or things might have changed. It might be different now. So many kids need a home and a family, and your would be such a wonderful one for them!