We know that iOS 4.3 Betas had multitouch gestures built right into the OS for iPad to take advantage of. But we also know that Apple isn't making it available to public with final release of iOS 4.3. Maybe have higher version.
If SHAtter is also patched, then someone will have to find another bootrom exploit in the new hardware for us to jailbreak it on iOS 4.3.
iPhone developer and hacker Joshua Hill, who happens to be the guy behind the latest GreenPois0n RC5/6 release hopes at least SHAtter is still in iPad 2.
You can download GreenPoison RC7 from the www.greenpois0n.com after its release. By the way, the official release for iOS 4.3 is coming soon too. The most possible release time for iOS 4.3 is the end of February or early March.