Few days ago, Redsn0w 0.9.5b5 was released by iPhone Dev Team for Mac OS X only to jailbreak iPhone 3G and iPod Touch running iOS 4 GM. Now Redsn0w 0.9.5 beta 5 for Windows has been officially released by iPhone Dev Team and by using it you can easily jailbreak iOS 4 on iPhone 3G and iPod Touch 2G on Windows.
The new version comes with many new features like enabling multi-tasking, home wallpaper and an option to enable verbose boot mode and battery percentage. It must be noted that this version of Redsn0w is in its beta phase and its only for activated iPhone and cannot be used to hactivate the iPhone.
Download Redsn0w 0.9.5 Beta for Windows
Update 1: Jailbreak iOS 4.0 with Redsn0w 0.9.5b5-2 on Mac [Updated]
Update 2: Jailbreak iOS 4.0 with Redsn0w 0.9.5b5-3 [Hacktivated]
Update 3: Redsn0w 0.9.5b5-4: Fix iBooks Issues After iOS 4.0 Jailbreak
Update 4: Download Redsn0w 0.9.5b5-5 to Fix iOS 4 APN / MMS Issues