as apple launched new ios 4 and now its available so every one is trying there hands on this new ios 4 and we have already post about iphone jailbreak and unlock with many tools.

• Jailbreak iOS 4 Firmware on iPhone 3G with Redsn0w 0.9.5b5-3
• How to Unlock iPhone 3GS iOS 4 with UltraSn0w
• Jailbreak iOS 4 iPhone 3GS with PwnageTool 4.0
• Fix iBooks After iOS 4 Jailbreak with Redsn0w 0.9.5b5-4
• Unlocked iPhone 4 now Available in France, UK, Canada

iH8sn0w releaseded the new version of Sn0wbreeze to jailbreak firmware 4.0 on your iPod Touch 1G, 2G and iPhone 2G, 3G, and 3G[S](old bootrom & non MC) on Windows.

Sn0wbreeze v1.6.1 is a jailbreaking tool like PwnageTool for iPhone and iPod touch which can be used to create custom .ipsw files and is fully compatible to work with Windows machines. If you have iPhone 3G (with old iBoot), 3GS or iPhone touch 2G running iOS 4.0, you can use sn0wbreeze 1.6.1 to jailbreak your iDevice.

Download Sn0wbreeze V1.6.1 to Jailbreak iOS 4:
Sn0wbreeze V1.6.1

also read this post:

• Jailbreak and Unlock iPhone 4 for Life : Geohot
• Apple sold 1.5 million iphone 4 in first day
• 5 iPhone Apps for a Better Night’s Sleep
• iPhone 4 launch day stories yellow spots, spotty reception
• Facetime phone calls on iPhone 4
• 77% of iPhone 4 sales were upgrades
• White iPhone 4 not available until late July