I don't want to believe that it is not possible to use compiz and other OpenGL applications at the same time. With such big community and open software is it that much hard to solve that issue? I read that it works with nVidia cards but not with ATI.
I am really about to switch Ubuntu from Windows XP but i hate this kind of problems i face everyday. Do i have to turn of compiz whenever i want to run google earth or any other 3D application

or stand that flickering issues. I am using awn and when i turn off compiz it also goes and therefore i cant reach open windows list.It is meaningless to decorate and customize all desktop with these apps and then turn them off before running an application.
So i think instead of spending time for other things, developers must solve hardware and driver related issues first.