iPhone Dev Team's latest PwnageTool v 3.1.4 for Mac OS X is now available for download adding jailbreak support for newest iPhone OS 3.1.2 on iPhone 3G/3G(S) and iPod Touch 1G/2G, sadly, similar to the previous PwnageTool release this version is also MAC only for now, however Windows users need not to worry as they can jailbreak their iDevices using recently launched Blackra1n.
Users having jailbroken devices need not to enter the DFU mode and simply need to create a custom IPSW file using PwnageTool v 3.1.4 and restore it from iTunes, this will update the device to latest firmware version keeping the Baseband unlockable so you can enjoy your device freely.