Keeping up with SBC/AT&T/Cingular/whatever’s corporate activity is rather complicated, and so Engadget has laid it out for us all the way through the recently-approved AT&T/Bellsouth merger.
Ironically, all these acquisitions are getting AT&T closer and closer to the “we control everything” status it held in the 80’s before getting split up in the first place because it was too big. Also interesting is that it sounds like the Cingular brand may be phased out in favor of the AT&T Wireless moniker that originally was phased out when Cingular acquired AT&T Wireless.