The Chronic Dev Team confirmed this past weekend that an since an untethered jailbreak for iOS 4.3.1 is available for the 1st gen iPad, they are now focusing their efforts on finishing an iPad 2 jailbreak. It appears that the iPad 2 jailbreak will be packaged in an updated version of the greenpois0n tool. According to Joshua Hill of the Chronic Dev Team:
"Since 4.3.1 is already exploited by the legendary @i0n1c, we are working on finishing iPad2 jailbreak now"
Apple has already patched the iPad 2 exploit in iOS 4.3.1 uncovered by comex on iOS 4.3, they also patched the untethered bootrom exploit utilized for an untethered iPad1 jailbreak.
Follow us http://twitter.com/iPadJailbroken or join our Facebook page to keep updated on all the latest jailbreak information for your iPad.