There is a serious supply problem for BTC in Argentina. Bitcoin trades at a premium here. Once there is an exchange here, BTC is probably going to permanently trade much higher than in international markets. If you're a tourist or you are buying something from anyone in Argentina, you should be paying in bitcoin.

I've already seen tourists selling bitcoins here for a 50% premium (in pesos) over international bitcoin prices. The bitcoin here tracks the black market dollar rate, so it sells for a huge markup over what should be the price in pesos.