Jailbreak developer chpwn posted the photo above from his Twitter account, crediting comex. As you can see, the device is obviously the iPad 2. There's no question as to whether or not it's running iOS 4.3.
Developer i0n1c already has a working jailbreak for iOS 4.3 but is currently working out kernel issues before releasing it. Whether or not comex will release his version sooner isn't clear yet. It's also not clear whether this version of an iOS 4.3 jailbreak will also work on other devices such as the iPhone 4. We also aren't sure whether or not it's tethered or untethered. The big news is that it's apparently working on the iPad 2. (i0n1c's jailbreak will not work on the iPad 2.)
While all you new iPad 2 owners patiently wait your beloved jailbreak, make sure you check out our jailbreak starter's guide! How many of you out there plan on jailbreaking your iPad 2 the minute a jailbreak is released?