Bouldering/Climbing in Argentina/Chile

Hi all, i'm going to be doing a 2 months WWOOF (short-term farmhand) assignment in either Argentina or Chile from December 2011-January 2012.

I would like to pick an assignment very close to good climbing, does anyone have experience climbing either of these countries and know of good clusters for climbing?

Greg, I'm writing you because I just moved this week to Santiago, Chile. I'm working on figuring out the climbing scene, feel free to give me a shout as you get closer to your assignment. If you come through Chile, I can lend some beta for sure by December.

Ken