The more I read on gnome 3.3 the more questions arise in my mind on the usability of gnome 3 with sawfish. The reading I have done suggests that the gnome-shell in gnome 3 is intimately integrated and built from a metacity variant called 'mutter'. Wouldn't the close association between the gnome-shell and metacity preclude the use of sawfish as a window manager with evolving gnome 3 builds?