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Sony's Sixaxis controller was, admitted in hindsight, largely a product of the lawsuit with Immersion over the rumble feature in Sony's controllers. Once the matter was settled, rumble came back in the DualShock 3, but it seems Sony could still be sizing up new options for controllers to compete with their stiffest competition, the Wii.

GamesIndustry.biz reports that the company is working on a new controller for the PlayStation 3 that can "break" into two separate controllers for motion-sensing purposes. Similar to the Wiimote and nunchuck, both controller halves would contain accelerometers for individual motion-sensing. The report goes on to state that working units of the new controller may have already been supplied to certain developer partners of Sony.

There's no word about an impending announcement or whether the individual pieces of the controller would each be equipped with rumble. Without official word from the company, this is all rumor and speculation at this point, but a reveal may come in a month at this year's E3. We'll keep you posted.