I never noticed it was missing to be honest

I hope they change the shape a little too, so it is more ergonomic...

they don't just need to get the rumble back in, they need to redesign the whole controller. The analog sticks in particular, having used the extremely ergonomic Xbox 360 controller, feel quite awkward, while the R2 and L2 trigger buttons are slippy and should be curved inwards. They may have the most powerful, feature-laiden console on the market, but that controller belongs back in the dark ages. I used to think that the original xbox controller was the worst peripheral ever, but that crown now rests firmly on the head of the SIXAXIS. Get it sorted Sony