Thanks for the answers guys. I should say, I'm not really a newcomer but have lived in BsAs before for about a year. The reason I ask these things now is because things have changed. When I stayed there was no blue rate (that I knew of) so there wasn't this great need to bring cash. You could take money out from ATM's. I wanted to know if there was some way to get a better rate at the airport (such as wiring yourself money in advance) but apparently not, so I'll take the hit I guess. I also asked about where to keep cash because I think hotels and such are on to the fact that tourists come with cash now. So I don't like to be targeted in that way. I don't feel safe putting money or anything in a safe to be honest. That's the first place a (crooked) hotel staff would look.
Some related questions. Does anyone know decent money changing places in Palermo?
Another question is apartments I see on craigslist; a lot now advertise that you can pay in pesos, even more than a couple of years ago. Is this because they need renters, or is there something going on. Could you still get a better deal offering dollars? Why would an apt. owner tie himself to a multi-month contract in pesos?