Last Updated: November 14th, 2012
The new Nexus devices just went live, and, as promised, Google has simultaneously started pushing the code for the latest iteration of our favorite mobile OS - Android 4.2 Jelly Bean - to the Android Open Source Project. Jean-Baptiste Queru, chief Android release engineer, announced the news via a post to the Android Building group.
Update 11:22am: Android 4.2 source just finished replicating to AOSP. "The platform source files for 4.2 have finished replicating, you can now sync." -JBQ
The build number is JOP40C, while the AOSP tags is android-4.2_r1.
Last Updated: February 12th, 2013
Just after users began reporting that their Galaxy Nexus devices were receiving an update to Android 4.2 Jelly Bean (build JOP40C, to be precise), it looks like the manual update package is available for download. As could be expected, this coincides almost perfectly with the launch of Google's newest additions to the Nexus family – the Nexus 4 and 10.
Of course, it's worth reiterating that this is an update specifically for the Galaxy Nexus' Takju variant – that means only Galaxy Nexus handsets bought from the Play Store need apply (we're still waiting to hear about the Yakju variant).