Buenos Aires is a huge modern city (population around 15 million) undergoing a lot of construction, especially in the Puerto Madero neighborhood, where this picture was taken. This was an old port that ceased being used in the 1960s, but is now the location of many restaurants, hotels, and businesses.
Although a website about Argentina business warned me that subjects not to discuss were the Perons and the Falkland Islands, both subjects were brought up by Argentinians I conversed with, and it wasn't a problem.
This was one of those rare trips where I returned home to Phoenix to find the weather much colder and wetter than it had been in the place I was visiting.
UPDATE (January 26, 2007): CNN Money recommends travel to Buenos Aires, and specifically offers this dining suggestion:
Tip: Cabana las Lilas in the Puerto Madero section of Buenos Aires is often cited as the best spot for grilled beef.I didn't visit Cabana las Lilas, but did eat at La Caballeriza with a large group of locals, and it was excellent (even the blood sausage wasn't bad).
But Robin Goldstein, a writer for Fodor's travel guides, says you'll find a more authentic dining experience at half the cost just next door at La Caballeriza (address: Alicia Moreau de Justo 580).