The first official beta of Brazil in Rhino hit the streets yesterday. It's still happening a bit below the radar and some bigger announcements will be coming as the team becomes more confident in it's stability and usability. I saw it in action at a Brazil users' group meeting a couple days ago, and I've gotta say that it looks pretty good.
Also -- check out the "introduction to" docs these folks are putting together -- really beautiful work.
... and, as a complete diversion, I just wanted to share the following video. It's an example of the types of internal code that developers come up with to deal with the complexity of this stuff (this isn't in rhino or max -- it's just internal Brazil code):
Images: David Rutten. Video: Cüneyt Özdaş