Blizzard Entertainment announced recently that their flagship game, World of Warcraft, will be available in Brazil sometime this year with a fully localized Brazilian Portuguese version.
They'll be pairing this with a Portuguese version of their community website as well as customer service.
The original game, which now includes the first expansion, will run players BRL 29.90, while the second and third expansions (Wrath and Cataclysm) will run approximately BRL 99.90 each. Current players can install a language pack for free, and there will also be Portuguese-dedicated realms.
More information can be found at the official Brazil page.