If you’ve been waiting for an untethered way to jailbreak your Apple device then the wait is over. Spirit was released a few days ago and currently supports all devices (iPhones, iPod Touch and iPads) with firmwares 3.1.2, 3.1.3 or 3.2. Jailbreaking your device allows you access to apps and features that Apple bans from the device and the App store. Developers are able to tap into areas of the devices that Apple locks out, thus allowing for a more customizable phone.
Check out http://spiritjb.com for more information on how to use Spirit on your device.