This is fast. Probably the fastest. iOS 4.3 was just released yesterday and it has already been Jailbroken. Untethered too! Means you can switch off/restart/reboot your phone anytime you want.
We are not sure when a proper iOS 4.3 Jailbreak tool will be out for the public but seems like it’s gonna be out very soon. Check out this video of the jailbroken iPad running iOS 4.3.