Feisty Fawn doesn’t really give you any options when it comes to customizing how you want Compiz to work. You get fading, and wobbly windows, but there is so much more you can tweak. GL Desktop is a configuration manager for Compiz that unleashes a lot more functionality. Think of it as a Beryl-Manager for you Beryl folks. You can choose between a rotating cube, or sliding planes when you switch between workspaces, enable mouse-driven zooming, make your desktop rain, and perform desktop annotations just to name a few options.
GL-Desktop is in the universal repository so installation is as easy as:
“sudo apt-get install gnome-compiz-manager”
Once installed it should appear under System > Preferences > GL Desktop