At the Google I/O event yesterday Google announced the latest iteration of its Android 4.1 firmware named as Jelly Beans and today we are seeing the very first unofficial Jelly Bean 4.1 firmware out in the wild courtesy of the XDA member bigxie, koush and Birdman who provided the system dump files, so check out the 4.1 firmware files along with screenshots of the latest android OS available as of now.
Download 4.1 Jelly Bean firmware for Nexus
Download link | Filesize: 230 MB
Fix root with this (flash in ClockWorkMod):
CWM Flashable Radio (XXLF1) (credit b16, birdman, rootz crew)
Official XDA thread, follow this closely if you want to flash the jelly beans firmware.
How to install:
Flash this over your Android 4.0 ICS rom with Full wipe data/cache.