There is more discussion on Brazil visas in "The World - Brazil" area.

While I don't know a specific Brazil visa facilitator, I do encourage you to use one. I tried to do the process myself several years ago. It took much longer than I expected, and was frightening. The first submission was returned and I had to pay a second round of "overnight" mailing fees. The actual visas arrived one day before our flight.

Do get professional help for the process!

Romelle