Will upgrading my Unlocked, Rooted (fastboot + superboot method) Galaxy Nexus from 4.0.1 to 4.0.2 brick the phone?
Well, doing the OTA update to 4.0.2 from 4.0.1 did not brick anything. Superuser is still installed and apps that require root supposedly have root permissions, but they claim they do not. 

I will attempt to re-root it, as I don't see why that will be an issue.

Thanks.