Internations

Internations is an organization for expats all over the world. You can sign up for expats in Brazil or expats in São Paulo.

http://www.internations.org/sao-paulo-expats

Couchsurfing

Couchsurfing is not only a way to find a place to stay, it is also a good alternative to meet new friends!

http://www.couchsurfing.org/

Utlandssvenskar

If you want to find Swedes in São Paulo or in other parts of Brazil.

http://www.utlandssvenskar.com/

General information for foreigners coming to Brazil:
http://www.gringoes.com/