In this package the xorg.conf for gma500 has been updated, as well as metacity configuration to allow the compositing on your desktop, you will notice a BIG improvement in windows movement, shadows, on-click effects and many many more (not really) :-D
I'm sure you will really appreciate this update, i don't know about power consumption, if you notice any difference let me know.
Download --> Compositing-Settings
1 From Pixel -
Where do I put this file? Thanks.
2 From Christian Lorandi -
@pixel:
in PixieLive/modules, and then reboot