For what it's worth, even though I know this has been reported previously, an AT&T rep reported to me that they are "simplifying" their plans tomorrow.
By the earlier reports, my assumption is that the Family Talk plans are disappearing in place of only Mobile Share plans.
In order to preserve future lines to add, I jumped from the 550 plan (3 lines max) to the 700 plan (5 lines max). I have to add another line in a year at the most and this option was much cheaper than switching to the Mobile Share plan.
By the earlier reports, my assumption is that the Family Talk plans are disappearing in place of only Mobile Share plans.
In order to preserve future lines to add, I jumped from the 550 plan (3 lines max) to the 700 plan (5 lines max). I have to add another line in a year at the most and this option was much cheaper than switching to the Mobile Share plan.