iPhonehacker ih8sn0w has just released the latest version of Sn0wbreeze 2.2. This tool works like PwnageTool to create custom iOS 4.2.1 firmware files on Windows. It is built with the kernel based GreenPois0n exploit for untethered jailbreak on iOS 4.2.1.

Devices supported:
- iPhone 4, 3GS, 3G
- iPod touch G4, G3, G2
- iPad
Features:
- Baseband preservation mode
- Play Pac Man while custom firmware (IPSW) is being created
- Change boot logo
- It also fixes the iBooks issue reported earlier
Download links:
- Sn0wbreeze 2.2r2
- Original firmware iOS 4.2.1 [iPhone 4 | iPhone 3GS | iPhone 3G | iPad | iPod Touch G4, G3 or G2]
- Microsoft .NET framework 3.5 (required to run Sn0wbreeze, download and install first)
Complete tutorials for newbies to follow! For those who have used Sn0wbreeze before – enjoy and leave your comments below.