The first ever iOS 6 beta was only made available a few days ago, but Redsn0w 0.9.13 is already out for those who wish to jailbreak their iOS devices and doesn’t mind a tethered jailbreak. iPhone Dev-Team has released the tool for iPhone 4, iPhone 3GS and iPod Touch 4G.
Per OSX Daily: “As the versioning implies, Redsn0w 0.9.13dev1 is intended for developers only. There are many components that do not work, including Apple’s default apps, many 3rd party apps, Cydia apps, and more. Furthermore, this version of the tethered jailbreak does not install Cydia.”
If you’re a developer and you wish to try this out, point Redsn0w at the iOS 6 IPSW file to jailbreak, and then boot tethered. As the Dev Team mentions, anyone attempting to use this version of redsn0w will need a registered UDID to activate their device.
If you’re brave go ahead and do this. If not, stick to iOS 5 while a better jailbreak (and maybe even untethered) is released!