Recently (Nov. 27, 2011), Greenp0ison website recently posted an article explaining about the progress of the untethered Jailbreak. It seems that the team will be having a no-holds-barred information WAR against Apple.
Its a cat-and-mouse game when it comes to Jailbreaking.
So, I don't think we will be able to see the untethered Jailbreak solution soon. In the meantime, people can still either use the semi-tethered or tethered Jailbreak first. But that will be on their own risk. There is always a possibility that the new method required a clean iOS.