I am listening to Rio Baile Funk: Favela Booty Beats compilation: The most brutally raw music I've heard in ages is exploding from the ghettos of Rio De Janiero @.
Read a review, get it from here.
Also, two blogs to recommend:
Great selection of samba/pop from 60s to modern stuff, and a lot of good music in general.
Rare and obscure funk collections and more.