PSP Plus will allow PS3 controllers to connect to PSP, says Sony
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According to this Joystiq story Sony announced PSP Plus at TGS today, a feature that allows a DualShock to wirelessly connect to PSP.
The system will only be supported by the upcoming Resistance Retribution for now - allowing players to use dual analog control with the third-person action game - but more titles will "potentially" use it in the future, according to that piece.
More through the link.