Firmware Version: Android Jelly Bean 4.2.2
Release date: 26.02.2013
Build number: CyanBook_JellyBean_4.2.2_Beta_2
Install the firmware following this tutorial from here. Download Cyanbook_JB 4.2.2_Beta_2 firmware from here or from here.
This is the newest firmware release from Google...
No comment for now! ;)
Always keep in mind that this is not a review, just a first sight of this firmware. You have to test it more for another details, to see if it satisfies your needs.