Last Updated: October 3rd, 2012
After upgrading my Galaxy Nexus (GSM) to Jelly Bean last night (I know, I know, I'm a few days late), I unlocked its bootloader (the usual fastboot oem unlock) and commenced rooting, which I thought would only take a minute or two. However, after almost 2 hours of pushing, flashing, rebooting, and trying no less than 5 different root methods, I still didn't have root. Something must have changed under the hood, and no root method I was trying was working (even PaulOBrien's SuperBoot).
Finally, I managed to find a solution that worked, and the familiar root permission prompt finally popped up.
Last Updated: April 3rd, 2012
In the last 2 days, we've seen a whole lot of Android 4.0.4 goodies. First, Google unleashed the Android 4.0.4 AOSP code, then followed up by sending out incremental OTA updates to the Nexus S, Galaxy Nexus, and XOOM Wi-Fi. Maintaining the momentum, today our favorite Android release engineer JBQ today put together full OS images for the GSM Nexus S and GSM Galaxy Nexus, which can be used to completely restore compatible devices back to stock.
Did a flash go wrong? Did you wipe /system by accident? Don't have an upgrade path to 4.0.4? Don't worry - with these full images you can forget your trouble and start with a clean slate.