I won't lie and say I didn't see this coming, but according to the official page, GNOME 3.0 is Rescheduled for March 2011 Release.
GNOME is driven by its goals to provide a quality free software desktop, and we feel that our users and downstream community are better served by holding the GNOME 3.0 release until March 2011. This gives adequate time not only for feature development, but user feedback and testing.
Having 3.0 ready for the "next" GNOME release was a pretty aggressive goal, especially with no "real" alphas or test releases out, and the only real evidence that the great "3.0" milestone being a hodgepodge of software released. Still, I'd rather 3.0 come out fully baked and ready for the world than a thrown together mix of software, paradigms and APIs. Still, it is a bit of sad news for those of us who were looking forward to 3.0 to come out this year.