The Spirit jailbreak application has been updated to support iTunes 9.2. Other than support for iTunes 9.2, no new features have been added. The Spirit application is one of the easiest way to jailbreak your iPhone/iPod Touch or the iPad. Sadly, the Spirit application still does not support iOS4 and/or iPhone 4.
Currently, the Spirit application supports iOS 3.1.3 and 3.1.2 for iPhone 3GS, 3G, and the iPhone 2G. All version of iPod Touch are supported as well. For the iPad, iOS 3.2 is supported. Users who want to jailbreak their iPhone 3GS/3G or iPod Touch running on iOS4 can use either sn0wbreeze or PwnageTool 4.0. On a personal note, I would suggest iPhone 3G owners not to upgrade to iOS 4.
The iPhone 3G does not have enough horsepower to run iOS4 properly. If by chance, you have already updated your iPhone 3G to iOS 4 and want to go back to iOS 3.1.3, follow this guide.