Word is Greenpois0n is going to be the next 4.1 jailbreak and I think they are still working on an unlocker. I think they got 4.1 JB on all devices with Greenpois0n but they have to refine everything so the phone isn't buggy, seems like they may wait till 4.2 is officially released to get it out, not sure, but this will be perfect for when I get my IP4.
