Masterdragon will be updating the list two or three times a day and requests that you check the list before posting your server's phase status.
I'm impressed that Masterdragon is putting in all this effort to update this tracking list. It's too bad that Blizzard can't provide one for us so that he doesn't have to. An official list could indicate the percentage completed for each phase as well. But I suppose they have enough work putting a spin on the undocumented changes that have popped up in Patch 2.4.
Do you think Blizzard should have an official list? Or are you just happy that a fellow player took the initiative to make one himself?