Bumping this thread up - is the advice here still current?

A few more questions:

My brother just handed me $300 Canadian that he won't use and I'm not going to Canada for several months. With a US passport, will I have any trouble changing the Canadian dollars into Argentine Pesos at Banco de la Nacion Argentina in EZE? I figured since I had to change money anyway it might as well be that.

Also, there are three of us going to EZE on seperate flights that *should* (HA!) all arrive within an hour of each other. My cell phone doesn't work in Argentina - what's the best way to meet at the airport without having a phone or internet access? If one of us is seriously late that person will just take a separate taxi.