iPhone Dev Team has just released PwnageTool 4.3 to bring untethered jailbreak for iOS 4.3.1 with the help of i0n1c's untethered exploit.
PwnageTool allows you to create full untethered iOS 4.3.1 custom firmware files. As you know PwnageTool is a Mac OS X tool, check out the supported devices after the jump.
- iPhone 4, 3GS
- iPod Touch 4G, 3G
- iPad 1 (Unfortunately iPad 2 still not supported)
- Apple TV 2G.