Ac1dRa1n will support iOS 4.3. It will be tethered and also it will include an option for Qu1ckboot using which you will be able to boot your iOS device in tethered mode with just one click. One important thing is that Ac1dRa1n will be released for both Mac OS X and Windows. According to PwnDevTeam, Ac1dRa1n will not work for iPad 2. So you will not be able to jailbreak your iPad 2 using this jailbreaking tool. You should note that still Ac1dRa1n is a rumor as it is not confirmed by anyone.