The Bangalore Hackfest was really useful for the release team to evaluate the status of GNOME 3. We really want GNOME 3 to be amazing, and various recent events lead us to wonder if doing the release next week is a good thing; we had a lot of discussion and meetings, and we even had a call with the Board to evaluate different options.
It was not an easy decision, but after announcing that GNOME 3 would occur in September 2010 instead of March 2010 as originally planned, and then pushing it back to March 2011, we have to announce another delay: GNOME 3.0 is now scheduled for September 2011. 
The announcement linked above explains the various reasons for this decision, which was really hard to take.
rest here