These are instructions on how to jailbreak your iPod Touch 3G and iPod Touch 4G using Greenpois0n for Windows. Greenpois0n supports iOS 4.1 and iOS 4.2.1.
These are instructions on how to jailbreak your iPhone 3GS and iPhone 4 using Greenpois0n for Mac. Greenpois0n has been updated to support the iOS 4.1 and iOS 4.2.1 firmware
Saurik has released an iOS 8 compatible version of Cydia for manual download following the release of an untethered Pangu jailbreak for iOS 8 - iOS 8.1.
The PanguTeam has released an updated version of its untether for the iOS 8.0 - 8.1 jailbreak, fixing an issue which could cause applications (particularly Safari) to randomly crash.
The PanguTeam has released an updated version of its untether for the iOS 8.0 - 8.1 jailbreak, fixing an issue which could cause your device to overheat due to excessive CPU usage.