Google just posted the new factory images of Android 4.1.2 build JZO54K for the Galaxy Nexus (“takju”) and the Nexus 7. If you own either device, be sure to grab the files for safe keeping. You never know when you may need to restore your device to 100% stock after tinkering for too long. We have generic instructions for flashing factory image files here.
Download: Galaxy Nexus (GSM “takju”) | Nexus 7
The binaries for all Nexus devices have also been added – that includes the Verizon Galaxy Nexus (“toro”).