The source code for the latest version of Jelly Bean, Android 4.2, is now available on AOSP (Android Open Source Project). This means manufacturers and custom ROM developers can start using this code to build Android 4.2 ROMs for current device upgrades and, of course, future devices. We’re all that much closer to getting Photo Sphere, built-in gesture typing, the updated notifications with a new settings tab and a few other new features. For those of you who can’t wait, you can try out the new Android 4.2 apps via a flashable zip file for the Galaxy Nexus.
Great news for all, or a consolation prize if you missed out on the Nexus 4 during the short window it was available this morning. The one bit of bad news is for the Nexus S which will not get updated past Android 4.1.2. The Nexus 7 3G and Nexus 4 are not yet supported in this AOSP source code release due to licensing issues.
Source: Android Central