[quote=Kestrel]
I couldn't take over Kadaeux' Star Wars game, and I don't think he'd be able to substitute for the Library. Our styles are simply too different.[/quote]

Very true. I've done long standing games, and that's why I think the idea struck me: would it NOT be fun as a reader/roleplayer to see a Kestrel SW game story arc, or a Kad Library story arc? Say something that'd last a few weeks at longest. Like earlier, presuming you liked and could work with the person. As by 'guest GM' I don't mean an actual GM, but someone that can write storytelling posts for the game separate from the GM. Just for a limited story arc. 

(I've always wanted to do 'seasonal' arcs of the same size in a game. Example: a Halloween scene where people become their costumes. Having to save Santa Claus. Etc.)

The power and responsibility aspect of it is completely in the storytelling, in the writing NPCs (friend or foils). I don't mean to suggest letting someone come in and run your game. Just limited run writers, essentially, for your game. That's what I mean by 'guest GM'.

Whereas the 'spot writer' idea is more writing a certain NPC (like a big bad) within the story and framework of the GM. It'd be giving the players a different style, and the unease of the unfamiliar. I doubt I'm the only GM that encourages their players to take up NPCs too powerful or plot heavy or specific to be any one player's character. And I'm probably not the first to suggest having someone even outsider your players coming in and doing it.

But the Guild is just so talent rich, I had to ask and see what the feedback was. And I'm a geek for creative collaborating. ^_^