Last Updated: October 22nd, 2012
OK, OK, that's actually Linus Torvalds expressing his feelings about NVIDIA, but there's no better way to articulate the continued frustration with the complete lack of Sprint Galaxy Nexus support in AOSP. Verizon is [almost] there. Sprint, however, is not. Try finding it (hint: its codename is toroplus) - specifically, the CDMA/LTE binaries.
If you still have doubts about the above notion so eloquently conveyed by Linus' gesture, Jean-Baptiste Queru's comment confirms:
As far as toroplus, the situation is unchanged: there are no plans to support it as a target device for custom AOSP builds.
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).