Really sounds like a great idea, and something that I'd defintely like to take part in. Heck, I'd make it a point to get my butt to wherever just to throw some ideas around and play with screens, simplicity, and mobile UI/X next.

The folks over at the Symbian Foundation have the ideas.symbian.org site; maybe something like that, from an organizational standpoint might help this effort... though I do hesitate in saying that there should be yet another website that has yet another login for yet another suite of conversations.