The Dev Team already have untethered to exploit i0n1c

i0n1c exploit has already made ​​his untethered in the hands of the Dev-Team to integrate it into your tool Redsn0w, the jailbreak will use the exploit to jailbreak Limera1n tethered and implement the i0n1c exploit to make it untethered.

So it's up to them to create a tool and present it as soon as possible. Hopefully soon and we end up testings have iOS jailbreak 4.3.1 in about a week.