"(Cholera) has now spread to Venezuela, Cuba and the Dominican Republic, and has now killed more than 8,500 people."
If we're thinking about this pragmatically, the world attention paid to Haiti during the flood saved far more than that number of people, even those not directly hit by the earthquake and instead were living with diseases that are prevalent in the third world.
We can split hairs over the effectiveness of the UN or international intervention, but before we start the ranting to the tone of hackernews isolationist/libertarian politics, keep in mind that Haiti is such a mess that we're still talking in terms of the broad good. Anyone that criticizes the role of the UN in this instance is a vulture looking to profit off of a natural disaster in a corrupt nation.