Sony isn't putting in the rumble feature because they would have to pay royalties to do that. They lost a case last year or the year before for illegally using the rumble technology which another company had a patent on. They were sue...lost and then had to pay a boat load of cash for everything already sold.

Same case was brought against microsoft...they payed the fine and then even bought a part of said company...maybe like 10% but no where near the majority contorl.