I note that there is almost nothing offered below Costa Rica. (Yes, one citation for Patagonia, and a beautiful place it is.) But there must be places in Rio, B.A. and even smaller villes that are proud of their hotels/resorts and could use the exposure on LL. Also, I think South America is going to only increase in importance as a pleasure destination. It isn't teribly well known; the currency exchange is still more or less favorable--or at least not punitive;it has everything from eco-primitive to sophisticated urban experiences. And from North Amertica, the flights though long are without the punishment of jet-lag because local time there is almost the same as here.
A note on suggestions involving hotel chains. They aren't what they seem. That is, most Four Seasons, Rosewood and are managed by those reswpective companies, but owned by individuals or individual holding companies. So each deal with each hotel has to be concluded separatel, I would imagine.
Hunter 1: Great point. I am not an expert on South America but would love to go. I would love to have some more boutique style properties in Brazil, Uruguay, Paraguay, Columbia and Argentina. The value right now is pretty good. It would also be a value destination. Also, not too much offered for Panama and Guatemala. Both countries have increased tourism during the past year and make great travel spots. Have been to both but would like to go again.