As promised and living up to its namesake of being a true 'Nexus' device, Google has just released the full Factory OS Image for the Nexus 7, Android 4.1 (JRN84D) Jelly Bean. Now many of you might not know but the 'code' name for the Nexus 7 was actually 'Nakasi'. Google releases this factory OS image for a couple of reasons. First, developers can tweak, hack and otherwise play with their Nexus 7 devices in order to develop their wares without having to worry about bricking their devices. They can always simply re-install the factory image and go back to the standard factory OS. The second is for us consumers in the unlikely case we somehow corrupt or screw up our devices (perhaps due to some unsavvy hacking) we also can have our Nexus 7's with a fresh reinstall of the OS (albeit probably with some professional or tech savvy help since most consumers won't want to do this themselves).
Interestingly "nakasi" is an "essential traditional popular music form in Taiwan"(from Wikipedia) It's also a suburb on the island of Fiji. We're not quite sure what the connection is to the Nexus 7 as for why they chose this name but it's an interesting factoid nonetheless.
If you are one of those aforementioned developers and are eager to get your hands on the raw material that is Jelly Bean for the Nexus 7 you can scroll down to "Factory Images "nakasi" for Nexus 7" at the link below.