I think there is a lack of understanding of how Brazil works (or what doesnt) RNE does mean you can live here, not work. Applying for citizenship is just a start to long and painfull process. Nevertheless depdending on the amount of money involved or how interested Brazil is to have you here things can be expedited (no guarantees for that and no specific path to be followed). I lived abroad for a long time and had my training done there, even being a native it took me a while to get a job here. The market looks quite promising here right now and this is motivating many guys abroad tohave a look, check for opportunities that arent available right now elsewhere and surely Brazil appears more atractive then China, Middle East, Kazachstan or Nigeria. But let me tell you, unless you totally commit to be here you will get frustrated. I dont know if you can imagine it, but life has got extremely expensive here. A good house is more expensive to rent than a copilots wage! Cars cost 2-3 times more then abroad, even food, or tropical fruit can be more inexpensive in NY! Not to mention the unpractical means of public transportation and health insurance, school, house security you have to pay for everything, even parking on a shoppping center, the other day in SP i paid $10 for an hour! And crime, you will have a cool approach to it until you get robbed or mugged for the first time...
As aviation happens to be centered in SP and RJ you wont escape from it.
I wish I could paint a better picture, but that is what it is right now!
Aviation authority is in a phase of transition, they have an urge to make things going until 2014, and many changes are proposed. Among it a bill to let foreign pilots fly here. But it is in a hold for a while and who knows when it will be decided and how. But hey, you could also try something with Embraer, as they are starting assembling in the US, Many companies do sim in US, many Brazilians have aircraft registered abroad, so if you have both licenses and speak Portuguese, this might be a door!