Jelly Bean test update leaks for the Verizon Galaxy Nexus
Verizon Galaxy Nexus users are at something of a disadvantage to other Nexus users, because their software updates still have to pass through Verizon for testing before getting pushed out to the general public. This process adds months to what should be a very fast update timeline, and still has users waiting for the Jelly Bean update that filtered out to GSM Nexus devices about a month and a half ago.
You'll need to be coming from IMM76Q, so if that's not your build number, you'll have a bit of a process to get there. The easiest is to flash back to stock IMM76K, then flash IMM76Q, then flash this Jelly Bean ROM (JRO03O). Additionally, you have to flash the new radios separately from the ROM, so don't forget those.