The Galaxy Nexus Root Toolkit by Developer "WugFresh" has been updated! This Program includes all the files that you will need to unlock and root your device, or flash it back to stock and re-lock it. This is a must have for any newb or for those like me that love it when devs make the modding process easier and less nerve racking. You can also do practical things like backup/ and restore files and data, flash zips, set file permissions, push and pull files, install apps, and much more.
This version adds support for all the Galaxy Nexus versions. Verizon, Sprint, and GSM are all supported now.
More info and download here