Examiner writes : "Call of Duty: Modern Warfare 2 apparently sold much better on the Playstation 3 than anticipated. The high demand for online multiplayer caused an overload to the "presence servers" on the Playstation Network, which tells your friends what you are currently doing on the Playstation 3.
Fortunately, Robert Bowling, the Creative Strategist of Infinity Ward, is saying (via his personal Twitter account) that more of these presence servers will be added to Call of Duty: Modern Warfare 2. No time table has been set."