MADE IT!! Definitely the long way around to get outta the US (note to FredMartens---several extra thousand miles toward EXP I guess....)
Iguazu Falls is absolutely beyond words. SPG Gold got me an upgrade to a Falls View room (and what view it is). The Sheraton is indeed right in the middle of this paradise, with the trails right here at the doorstep. Anyone even remotely thinking of a trip to Buenos Aires would be VERY WISE to consider swinging up to this incredible place...I am so glad I did.
AA delayed my return flights by a day due to all the delays getting here, so I'll be around the evening of the 13th (landing at AEP 5ish from Iguazu, leaving 9.30pm from EZE for the US).