I'm not brazilian, I'm Chilean, but I can explain it to you
Woodstock Festival will take place only in Brazil. What will happen is that probably all or some of the bands that will be playing in Brazil at Woodstock, will be also playing in Argentina and Chile, but in a festival with a different name, which is Maquinaria Festival.
This news also appeared in Chilean webpages, here's one for you to check out (in spanish) : http://www.humonegro.com/magazine/conciert...egan-este-2010/
According to the brazilian webpages, LP is almost confirmed. Let's wait and see.