Stalker0, last Sunday a DM used your system in one of his games, and I loved it! The high point of the game was my dwarven Paladin using Bluff... a skill he'd never attempt under the old system, but I described it so well I had the entire group laughing, and the DM gave me a +2 bonus to the roll. It was a lot of fun.
I'm strongly considering adopting it for my own games, but one thing I wanted to ask: how to deal with sequential challenges.
RAW skill challenges encourage you to roll for initiative, I think, but that feels too rigid. But a willy-nilly, "everybody go as soon as you think of something" system feels too lose. For things like intense diplomatic negotations, a certain give-and-take is important. Instead of saying, "Okay, everyone tell me what your character is going to do in this situation," I want to say, "Okay, Player1, what do you do? Okay, the orc chieftain responds like this. Player2, what do you do? Okay, the orc chieftain doesn't like that. Player3, how will you fix this?"
How would you suggest handling something like that, using your system? Let the players decide amongst themselves?