i like this approach. This would be entirely possible with G+ and would mean there is less chance of people talking over one another. i see no reason that this couldn't work.
There is a questions wall where people can ask questions where we can pick up from everyone contributing
Jayke Watson said:
It would be good if it were only SE and DreadsUK and there was a live message board/chatroom for the people watching that could be seen by both SE and DreadsUK and then we could have a fast and high quality video feed whilst still allowing people to weigh in/ask questions Looking forward to it