The suggestion is simple. don't have the people doing the narration actually playing the game. Get however many people to play, and have two people doing the narration like you would at a football game. Give the people narrating the ability to show the screen of the active player. I think that would make for a very entertaining dev stream!
I like the idea emmagine, however, I don't know how easy it would be for them to show the active players screen if they were playing people from the forum community. They would be able to show their screen but, that's about it I think.
I didn't mean to suggest they play forum members. There are plenty of people at stardock
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