If you just can't wait for the official version of 4.2 jelly bean to be released, I am right there with you. Lucky for us @KillDroidHack has packaged together a nice flashable.zip file that will add all of the new 4.2 GAPPS including the new clock, keyboard with gestures, and Photospere to any Android device running Jelly Bean. You will need to be rooted and you will need to have a custom recovery installed. To flash just download the file from the source link below. Then boot into custom recovery wipe cache, wipe dalvik cache, and install. There is no need to wipe data. This will work on CM10 and AOKP JB as well as any Jelly Bean roms or any phone that is running stock Jelly Bean.