Hi,
I also thought about it a while ago. I don't know how it could be done from within BBB because I don't really know how these streaming services work.
But in BBB all components are somehow independent: there's a stream for each video, the voice goes to a sip server, the presentation is also in another data stream and so on. You would need to "compose" it all somehow before sending to the streaming service.
One thing that can be done now is to capture and transmit your entire screen when you have a BBB client open. You just need an application that can do that. A lot of streamers are using xsplit (
http://www.xsplit.com/).
It can be a nice solution to stream a BBB session (for webinars maybe?).
Regards,
--
Leonardo Crauss Daronco