@comex, a member of the Dev-team has been working hard on an iPad2 jailbreak since the device was released. The jailbreak will use another PDF exploit via jailbreakme.com and support iOS 4.2.1-4.3.3. Last night, however, one of the jailbreak beta testers leaked the exploit online. This version of the JailbreakMe 3.0 exploit has not been confirmed by the Dev-Team or @Comex himself. Many users have reported that this exploit only works with WIFI-only iPads and issues with Safari crashing. (Sounds wonderful!)
It looks like everyone seems to have missed this! But if this statement from Comex is anything to go by,
the untethered jailbreak for iOS 4.2.1 might be as simple as installing a package from Cydia over your existing Redsn0w tethered jailbreak – Yes, you don’t need to restore or re-jailbreak your device.
We have 2 news about GreenPois0n , one good news and bad one.
Good news is GreenPois0n will be UnTethered jailbreak .(i.e. you will not need to connect your iPhone to your computer when you need to reboot).