TechRadar reports that Google has officially released the Android 4.1 source code today

Android Jelly Bean is the latest incarnation of Google's mobile platform and sees an improved user experience, thanks to Project Butter, along with various other upgrades and improvements over Ice Cream Sandwich.But before you get over excited, the Jelly Bean (version 4.1.1) source has only been released for the Google Nexus 7 and Samsung Galaxy Nexus, although Google promises versions for the Motorola Xoom and Google Nexus S will arrive soon.

  Android 4.1 Jelly Bean source code released