Screen off animation similar to Android Gingerbread?

There is no such compiz plugin in existence, but if you have C++ skills, or know someone who can take a try at it, it would be relatively easy to write such a plugin or extend one of the existing plugins to produce this animation.

There is a similar animation for compiz in the git repository (I think it was part of "simple-animations"). It would have to be ported to C++ and then modified to work on login or logout.