Congratulations, Green Eye Crazy!
Now let's hope for some good news from Tars, Roselinda, Lucian's Girl, and everyone else who is still waiting. And from Lucy4!
JKD, to answer your question about how long it takes--right now it is taking an average of about 3 weeks to get from CSC to NVC to the consulate. To see how long it takes to get through your consulate, click on the "processing times" link at the top of this page, then click the link for "K1 visa processing times" (under the graphs on the right). Scroll down to "Step 6--Embassy processing times." At the bottom of that paragraph, where it says "view processing time for several popular consulates here," click on the word "here."
Anyway, before you head down there, you might want to make sure you have all the documentation you need to get from home. I don't know what Brazil requires, but you will PROBABLY need to get the supporting documentation for the I-134 (affidavit of support). If you check the embassy/consulate reviews, you may find one that tells you exactly what will be in your packet 3 and what you will need to provide. (Yes, I'm sure you've already thought of this, but just in case you hadn't!)