Not to be left out, it looks like the Galaxy Nexus Takju is getting its own 4.2.1 update just after the 1.1MB package started hitting the Nexus 7 and 10.
If you've got a Takju Galaxy Nexus and don't feel like waiting around for the OTA to find its way to your device, you can – as always – install it yourself.
It should be noted that this update package is only meant for Takju – that is, the Galaxy Nexus available in the Play Store. You should also be certain that your device is running 4.2 JOP40C before installing this update. Those with a Yakju Nexus – sit tight, the update link should crop up any time now.
Update: Yakju is now live as well. See the bottom of the post for the download link.
As always, be careful when manually installing the update package. Those with a custom recovery can just download the zip below, move it to their device, and flash away. If you're running stock recovery, just follow the simple instructions from our last Galaxy Nexus update post, substituting only the zip file name in Step 2.