updated 11:47 am EDT, Fri May 25, 2012
Most A4, A5 devices supported
An anticipated untethered jailbreak for iOS 5.1.1 devices has been released by hacker pod2g and the Chronic Dev Team. Called Greenpois0n Absinthe 2.0, the software is notable not only for supporting the latest version of Apple's iOS firmware, but also reportedly almost all A4 and A5 devices, including the iPhone 4S and the third-generation iPad. Traditionally, support for A5 hardware has been difficult due to changes made by Apple that closed an earlier exploit. The one exception to support in Absinthe 2.0 is the revised iPad 2 equipped with a 32nm chipset.
Mac, Linux and Windows versions of the software are available. The installation process involves simply backing up a device before erasing all content, and then running the tool.
An untethered jailbreak is more ideal, as it eliminates the need to connect to a computer via USB every time a device is booted. Tethered hacks are easier to accomplish, though, and are generally the first to arrive.