This has been rumored for a bit, but over the weekend AT&T officially announced plans to buy DirecTV for $50 billion. DirecTV is one of the companies perpetually being bought and sold (or rumored to be). The company has been involved in more aborted mergers than I can remember. Either way, while Wall Street folks often like just about any merger announcement (mergers and later spinoffs are great moneymakers for the banks), even it has been scratching its head at this particular deal.