Lordy, that’s a bit old, yeah, great film, someone nicked my copy 🙁 Anyway, if you liked that you will like the mini series that span off from it, “Cidade de Homens” (City of Men).
Apparently shown on BBC4 in 2004, either way, I recommend getting it. Oh and after they made the film it lead to a gang war as most of the actors they used we from the favellas and apparently used the film to exact a bit of revenge, anyway, people died, it was sad.
Also, check out the documentary on the DVD, it’s both scary and compelling.
edit : http://imdb.com/title/tt0364801/
Turks, I was going to watch that this evening too. Weird. Although it is probably my favourite film.