We received tips from a number of folks this morning that the Nexus 4 has finally had its source code dropped into AOSP - and it has! Sort of. If you head over to the Android Git, and to the /lge/mako repo, you'll notice lots of things that people with beards understand. And those things are, basically, the source code for the Nexus 4 (which is still called mako in AOSP, apparently).
As you already know, the Nexus 4's source code was not included on the day Android 4.2 was pushed into AOSP, with Android maintainer JBQ saying only that support for the Nexus 4 was not available "at the moment." Today, it seems that we're moving toward that goal - though we aren't there just yet.

- Sony Releases Xperia S Binaries For Use In AOSP Support, Will Get Devs Far Enough 'To Boot Up And Reach The Homescreen'
- JBQ: The Nexus 4 Is Not Supported In AOSP "At The Moment"
- New Jelly Bean (JRO03H) Binaries Up For Nexus S/4G, Motorola Xoom Wi-Fi, And Verizon, GSM Galaxy Nexus
- Android Binaries Updated To JRO03R For All Nexus Devices; Jelly Bean Factory Image Released For The Verizon Nexus
The Nexus 4 Is Sort Of In AOSP Now, Still Not Officially Supported was written by the awesome team at Android Police.