With some of the recent problems and re-organization going on within the guys working on Compiz would it not be a good idea for Canonical to get involved or fork the project for themselves?
If, for example, Compiz dev went into meltdown, what are we left with? Metacity.
While Metacity's OK for average desktop work it doesn't scale at all well with graphic card enhancements. I guess more importantly for Ubuntu it offers little in the way of 'pizazz' that keeps the Ubuntu desktop in touch with modern equivalents like OS X and Vista.
I think it would be beneficial to ensure we have a working modern window manager for the future. Whether it be Compiz or a much better replacement.