I brought this idea up a while ago but it never seemed to go anywhere, which is why I'm suggesting it again.
I really hope VLC can get an option in Streaming to stream Audio to the Mic output and Video to the Webcam output so that it can stream to sites that take that input, it would make things easier if one wants to quickly stream a video on a site that allows such a thing.
It would also be helpful if one wanted to stream to a group of people over skype or another chatting program.
Hopefully it would also support having it so that your voice can still get through somehow... I'm not sure how or if that would work though.