PS3 Rumble On the Way?

With the obvious downfall of the PS3 controller you can't blame Sony for wanting to implement rumble into their controller. SCEA president, Jack Tretton, agrees. He says Sony is "Open to changing the SIXAXIS controller". There are some "insiders" who say that this is already in the works, but they are running into some trouble:

Many have suspected that since the agreement [with Immersion], Sony will have been working on a new controller with rumble support. We can now confirm that this is the case. We've heard from two independent sources at Sony that they have been working on prototypes for several months. Officially, the corporate line is still "no comment". Unofficially, Sony is facing some difficulties with battery life; i.e. Between the rumble and the wireless support, the batteries are draining too fast to be acceptable for consumers.

[From Kotaku]