As Apple seeded ios 5.1 yesterday, iPhone dev team has updated their jailbreaking tool Redsn0w to version 0.9.10b6 which can be used to jailbreak all A4 devices on iOS 5.1. The jailbreak for 5.1 will be tethered jailbreak. A tethered jailbreak requires you to connect your device to a computer to boot tethered each time it is switched off for whatever reason.
Below are the download links for Redsn0w 0.9.10b6 for both Windows and Mac.
