The recently released beta of iOS 6 can now be jailbroken if you have a A4 device
The cat and mouse game starts again. Just a few days before Apple released the iOS 6 beta to developers, it has been jailbroken for A4 devices (iPhone 4 and below). Unfortunately, there is no Cydia that works with iOS 6 yet but it's a matter of time that it becomes available.
So, if you are brave enough and are running the iOS 6 beta on your device you can jailbreak it following the tutorial in the link below.