Those residency papers already have come in handy. Tickets on Aerolineas Argentinas are about half the price for residents. We picked up round-trip tickets from BA to Mendoza (capital of the wine country, as everyone knows) for $300 US for the two of us. Charge to non-residents would have been $750 US. Life is good.
Sunday we head to Mendoza for a quick reconnaissance (and break from waiting for the furniture to arrive). Back on Thursday to continue the process of setting up the bank account here. More paperwork, but it's worth it.