in typical geohot fashion, he released his new jailbreak limera1n out of nowhere without consulting the rest of the scene (or even much testing). At the time of this post, there are already four updates to his tool. Chronicdev and Dev-team are quickly updating their own tools to use the limera1n exploit. This way, they can save SHAtter for a later release. Limera1n and SHAtter are bootrom exploits. This means they cannot be patched out with a software update. However, they themselves are tethered jailbreaks. They rely on the hard work of @comex to patch the kernel and make it untethered. Limera1n does have the advantage of supporting more then just a4 devises (new bootrom 3GS owners cheer). Unlockers beware, updating to an unmodified ipsw will break your unlock possibly for a long time.