The “Spirit” jailbreak is now available for all iPhone OS devices (including the just-released iPad 3G). The jailbreak, is untethered....which means that once you have hacked your Device using the one-click software, you can restart it at will, just like you could with a clean, Apple-approved copy of the operating system.
Some alternate methods require that you hook the iPhone OS device up to a computer to enable it to boot you access to the file system and to allow running of third party software (as much of it as you like at the same time, hence the possible battery-life hit). With this release, the third-party application repository Cydia is reported to be buggy.
iPad Spirit Jailbreak Download also works for iPhone or iTouch 3.1.3
The free, untethered jailbreak is available for Mac and Windows, and works with any iPad, iPhone, or iPod touch on firmware 3.1.2, 3.1.3, or 3.2. It’s a quick, easy one-click process, according to QuickPwn, although the Cydia app is buggy. Just download the jailbreak software, plug in your device, and your iPad or iPhone is instantly recognized. Hit the “Jailbreak” button and you’re done