iH8sn0w has just released Sn0wbreeze, which is the Windows version of the PwnageTool – for iPhone 3GS, iPhone 3G and iPod Touch users to update and jailbreak iOS 4.1.
Sn0wbreeze allows users to create custom iOS 4.1 firmware so that they can update and jailbreak their iPhone and iPod Touch with iOS 4.1.