Gaucho100K:
You may get a new airline to Buenos Aires. I have flown Continental (Business-First or so) from Houston to GRU ... that was one of the best flight I ever had: Very friendly service, excellent food, good wine selection, 2-1-2 seating ...
Continental Airlines applied to the US Dept. of Transportation to operate daily nonstop flights from Houston to Buenos Aires. If approved, the carrier said it would launch the flights in November using a 767-200 in a two-class configuration.