People who have hybrid GPU laptops can now test a patch called switcheroo from David Airlie which is written by Martinez on Phoronix Forum. Basically, this patch is intended to work on the next kernel release, as it may require some new DRM and noveau codes which lies on 2.6.33-RC7 (the latest development Linux kernel at the time this post is written).
I'm not sure whether this patch is applied for NVidia or not, but it surely should work for Intel/ATI combination. I'm hoping that David will also post how to make Intel/NVidia works in the future (perhaps in 2.6.34 later on).
Well, it's a good sign anyways.