The iPhone Dev-Team has updated RedSn0w to perform a tethered jailbreak of iOS 6 beta 3. Note this release is intended for developers only.
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.
You can download the latest version of RedSn0w from here.
Update:
Non-developers can find instructions on how to jailbreak iOS 5 for their device here.
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.
You can download the latest version of RedSn0w from here.
Update:
Non-developers can find instructions on how to jailbreak iOS 5 for their device here.