One of our most innovative developers, WugFresh, has just made some improvements to his amazing Galaxy Nexus Root Toolkit, that we reported on previously. The toolkit is up to version 1.2.2 now, and makes unlocking, rooting, relocking and unrooting even easier. Here's a quick quote from WugFresh with a description of all its myriad uses:
Here's a download link: WugFresh - Galaxy Nexus Root Toolkit Version 1.2.2VERSION 1.2.2 - This program contains all the files you need to unlock and root your device, or flash it back to stock and re-lock it. You can also use this program to backup all your user apps, system apps, and app data, and easily restore them later in one click; and now with the latest release (v1.2.2) you can flash or boot any img files you wan't to any partition on your device; as well as flash any current or future stock android release, making updating your device as easy as can be.
Don't forget to check out the source link below for more info about his project and a couple more download mirrors if you need them.