iH8sn0w who is behind Sn0wbreeze with which you can jailbreak iOS 4.0 on iPhone 3GS/3G & iPod Touch 2G non-mc model on Windows  and now he has released updated Sn0wbreeze 1.7 to lets you to jailbreak iPod Touch 3G only if you have SHSH blobs saved for iPod Touch 3G 3.1.2.

Download Sn0wbreeze 1.7 to Jailbreak iOS 4.0 on iPod Touch 2G, 3G Download Sn0wbreeze 1.7 to Jailbreak iOS 4.0 on iPod Touch 2G, 3G Sn0wbreeze 1

Download Sn0wbreeze 1.7 to Jailbreak iOS 4.0 on iPod Touch 2G, 3G
Download Sn0wbreeze 1.7