Okay, maybe I'm missing something here. If we can't roll back once we go to JB, then how can we "reset" the system to take the "official" OTA update when they finally release it? I guess (from my earlier comment) that they will HAVE to put out something to go from this version (since it was rolled out OTA to a bunch of users already), but you never know what they will end up doing, I guess.
He makes a good point, I was thinking about that myself. Back when ICS was rolling out in varying different versions, how did everyone get back on track for the OTA version that was deemed the "final"?