Multiple Narrators
I think that a game with multiple narrators could be good, especially for larger games. It will lessen the load on one specific narrator, and could function in a way similar to how some D&D games have multiple DMs. One way of doing it could be to have an admin narrator, who has more power than the other narrators and creates the game. Who knows, it could make the game overall more enjoyable and open up ore possibilities!

Rotating narration is now open for all games – the Host who created the game retains administration rights but the narration duties can be shared among multiple players.
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Brian Tkatch commented
Might be best to consolidate here: http://storium.uservoice.com/forums/211322-general/suggestions/5626351-allow-shared-narration
(thanx needsnaming)
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Robert Mohr commented
Agreed. I'd really love to see the option to have multiple narrators, and to enable people with a narrator role to play characters in the game. We actually have an RPG that we play on a Google Site right now, and I could see us bringing it over here easily, but we trade off GM roles and everyone's character is in every plot, so at present we'd have to start a new game for every plot and I'm not sure that's the best thing. Having multiple narrators could help that a lot.