It's rather old news, but today it has been finally set as default—yes the wallpaper for Fedora 18 Spherical Cow release. It took so much time because I didn't manage to update the package that sets the defaults in time before Alpha freeze.
You probably have a general idea of what the wallpaper looks like from my post about pre-alpha version of it, but since then it has been polished a bit—mizmo did a great job on that—and now it looks like this ;-)
Enjoy.
