Condorito,
I don't know for the rest of Latin America but in Chile at this moment things have settle a little (compare to three years ago or so). I know that some people who where not born in Chile and with foreign licences are curently flying with Lan Chile but I'm not quite sure under what provisions and terms. Mainly all you need to join LA is to meet the entry requirments (CPL and minimum 300 hours) and be at the right place at the right time. As you log more time your chances increase but as I see it, it all depends on timing. Lan Chile is not hiring on a regular basis at this time but you always may give it a try. As for the others companies I'm not quite sure how they are doing. Aerocontinente might be looking for some qualified drivers as they recently started op's from SCEL with a 767-200 and some 737's.
Cheers!