When an update hits, that usually means that a factory image isn’t to far behind. Google just released the Jelly Bean factory image package to build JRO03O. This is good news for those of you that know what it is good for. It is basically a set of disc images that you can flash to your Galaxy Nexus and bring it back to factory Jelly Bean, just like the update does. It is a great way to get in and screw up your device a little and have a way to get back to stock safely.
Source: Google via AndroidCentral