Seems like a good time to share something that has been out for a while...
BMW has Active Roll Stabilization (ARS) It works in concert with ABS and DSC (Dynamic Stability Control) and EDC (Electronic Dampening Control) . Sensors in the car measure Steering angle, braking, acceleration, yaw, fore, aft and lateral movement in the vehicle. The sway bars are hydraulically controlled to twist causing the car to turn flatter in the corners. Its not changing COG but you would effectively end up with the same result.
Heres a video of start-up. You have to perform the start-up procedure anytime the module is reprogrammed or one of the bars are replaced. Its always fun to watch. This is what a car looks like when you put powered sway bars on it!! LOL!!
http://youtu.be/ngOjtS5WQ4o