TAM Airlines used to be a member of Star Alliance but left the alliance in favor of Oneworld recently. TAM was basically invisible from award booking since award availability was often one seat per year (!) in business or first class per route.
This seems to have changed now and award availability is fantastic in first class!
However the airline isn't psyched about load factors (no surprise without award flyers) so the days are limited.
It's a great product, though and certainly something I'd like to try before it goes away!
It is 125,000 miles from the US to Brazil in first class using American Airlines AAdvantage miles.
Pictures courtesy of ausbt.com.au