"Nosso propósito é proporcionar a brasileiros e estrangeiros meios de aperfeiçoar-se na língua falada e escrita no Brasil."
So it does recommend itself for BPFL learners as well. ^^
Something I noticed was that the website isn't bilingual so it might be recommended for advanced learners, mainly.
Liked the website, though. It says the correct ways and the most used ones..
I can't imagine a Brazilian saying ..
" Fomos nós quem aguentou a onda.
Foram eles quem atrasou a obra.
Foram apenas as meninas quem se machucou."
That IS awfully correct. Marcio, NEVER EVER use them, they sound like cr*p.