I doubt you will get an answer right now because unlock is not as widely publicised as JB. They say 4.3 should be out in March which is before the new phone will be out. The unlock usually uses the baseband of the prior firmware ie. using 4.1 baseband right now. So I would say when 4.3 comes out keep your phone on 4.2 until pwnage tool comes out with an update. So using pwnage tool will allow you to JB the current firmware without upgrading the baseband. Then hopefully there will be an unlock and you can apply the unlock.