Jailbreak is a process of opening phone gadget to insert application from the third party. Jailbreake is done to create firmware with extension .ipsw. This firmware won’t be contained with new baseband that comes with firmware update. Meanwhile user still hope to get new features that will be gotten in new firmware of iPhone 3G.
To jailbreak your iPhone 3g 2.2 user now can use PwnageTool 2.2.1. If your iPhone is contained with Mac Operating System X, QuickPwn for windows operating system. Here you can download the tool that you can use for jailbreak your iPone 3G 2.2, PwnageTool. To download this tool you can visit this site http://thepiratebay.org/torrent/4527959/PwnageTool_2.2.1.dmg.
The unavailablity of this tool in this site is because the size is too big to be downloadded and impossible for admin to upload. So I am sorry for this unconvenience.