I just found this:
We were the first site to mention that Brazil would have a Woodstock festival in 2010, but now it can carry another name. Soon we will know the real name of it
For now, what is certain is that, apart from Rage Against The Machine, Incubus and Pixies – Linkin Park was added to the line-up.
Linkin Park, the greatest rock band of the last decade, according to Billboard, will be announced soon. It will also be the first show of their new world tour, probably with a very special guest, very famous (dare I say.. Jay-Z?).
Great add for the brazilian fans, because their new album is expected for the last week of September.
A press conference, in New York, is being prepared for late June / July to announce the festival and members of Linkin Park are probably present on it.
Thoughts, still speculation?