Dialog

As the game stands, dialog is a little odd. Who gets to speak for whom, and when? If it's one player's turn can others speak? If not, how do yyou get a dialog (or conversation)? If so, how do you keep track of turns? And what about dialog that creates fact?

A few options.
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Only speak on your turn, for any character you like (essentially creating color), others may not interrupt.
Create a Dialog space with the expenditure of a coin which can only be closed by spending another (or agreement of all players?).
Anybody can speak for any character at any time, but have a token to represent the current player's turn, and he can halt dialog at any time?
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We have actual ideas for the latest version, but I was hoping to stir a little debate and see what falls out. We have found it important to rigidly identify how these things work, and I would appreciate comments.

Any preferences/suggestions for handling turn order and dialog?

Mike