Fabio Akita recently posted an entry on his blog with the details of the upcoming Rails Summit Brazil.
The list of speakers is impressive, I'm sure the opportunity to visit São Paulo probably had something to do with that. I'm guessing the majority of the speakers will be presenting in English, but there will be live translation to Portuguese also.
I'll be there for sure -- Fabio was kind enough to invite me to be a speaker.
Be sure to thank Fabio in person for giving you a way to justify a company trip to São Paulo. See you there.