"First, Blizzard will be adding private chat channel functionality in some form in a patch shortly after the retail release of the game. A long-requested feature, chat channels were not in the beta test and will not be finished in time for the shipping product, but will be added soon thereafter. This should help players organize with friends, clans, and communities prior to the planned group functionality, which was originally going to introduce chat."
Basically, we heard several different dates regarding Phase Two. We went from June 27th to July 1st and tomorrow we'll probably have a new one.
Just remember that all these dates are just speculations without an official confirmation from Blizzard.
The good thing is we know it is definitely before July 27th!