Once Compiz Fusion gets an official release, there will be a second, more stable repository based on the released version.
WARNING: Please, only use this repository if you are prepared to experiment. These packages should be considered unstable and are not recommended for a primary or work critical system at this point.
O sea, que es un repositorio temporal, mientras sacan una versión más estable. Tenedlo en cuenta al instalarlo.
Yo lo probaré en el portatil, que tengo una sid instalada.