The Inquirer heard from Immersion boss Victor Viegas that the reason why Sony dropped the vibrate feature from the new controller isn't because it interferes with the motion-sensing technology. It's because the PS3 controller is too flimsy:
However, according to Immersion boss Victor Viegas, the problem is because the controller is too light and flimsy.
A lot of the developers who had built vibration into the PS2 were also disappointed that the technology had been removed, he said.
To be fair to Sony, Viegas has managed to extract $90 million in a lawsuit against the Japanese corporation, for using its patented vibrating controller idea.