The CBC has a great list of which countries are giving and how much.
Given the size and scope of the crisis, the response from the world community seems particularly small. Individual contributions will likely grow this number, but give what you can.
Especially in the US. I would like to see private donations in the US vastly exceed government contributions to send a message to the Bush Cabal — the United States has not forgotten the rest of the world.
It seems that the US has decided to kick in another $20M. I gave my $100 to the Canadian Red Cross this afternoon.