The Dev Team released an update to the beta version of its popular RedSn0w jailbreak tool this afternoon, with support for the latest iOS 6 firmware.
For the Dev Team’s website:
“The “dev3″ version covers today’s 6.0beta3 release (and also adds explicit support for 6.0beta2). Please point redsn0w at the 6.0b3 IPSW in order to jailbreak beta3 and boot tethered.”
It’s worth noting that just as iOS 6 betas are meant for developers, so is jailbreaking them. This version of RedSn0w will not install Cydia, due to the fact that a number of packages have not been updated to support the new firmware.