Great thread; Mr 5 you are doing everyone a big favor by posting your findings.
I have a 135 with 900miles and I just developed this rattle. I hear it loud during idle, and my car already has the horrible laggy software (July 08 build). The SA told me he would have to update the software first and only replace the actuators after it rattles post-update. My car has exceptionally bad throttle response and I wonder if the latest software will even slightly improve this... I will find out soon...