iPod Touch may look like iPhone but it belongs to a different genre of devices. It runs on same firmware which is developed for iPhone which means that the firmware update released for iPhone is also applicable to iPod Touch 3G or 2G. Since Apple has announced iPhone OS 4.0 and released a beta version for developers, iPod Touch users are also waiting for public release of firmware to upgrade their devices as iPod Touch 4.0. Officially, users of iPod Touch 3G will be able to utilize all the features introduced in iPhone firmware 4.0. These features are multitasking, support for installing more applications, and many others.
Breaking: JailbreakMe lets you Jailbreak Pod Touch 4.0, iPhone 4 3GS [4.0 and 4.0.1], and iPad 3.2.1
Despite some deficiencies in iPhone firmware 4.0 has been eliminated which pushed iPod Touch users to jailbreak their devices, a number of other reasons will hold true to jailbreak iPod Touch 4.0 like internet tethering and cydia apps. Jailbreak iPhone 4.0 was accomplished by iPhone Dev team within 24 hours of iPhone firmware 4.0’s release. Now, another known hacker ‘ih8sn0w’ has successfully managed to jailbreak iPod Touch 4.0 running on 2G device. He has posted a video which demonstrates iPod Touch 2G running on jailbroken iPhone firmware 4.0.
A developer “demize95” with assistance of ih8sn0w, has also managed to get decryption keys of 4.0 firmware [beta 4] running on iPod Touch 3G [3rd Generation]. This means that sooner we will see Jailbreak iPod Touch 4.0 firmware on 3G as well. We can anticipate that sn0wbreeze 4.0 will jailbreak iPod Touch 2G and 3G on 4.0 firmware.
Update 1: limera1n jailbreak may be the next tool by GeoHot. It is expected that it will be a Jailbreak iPod Touch 4.0, Jailbreak iPhone 4.0 solution as previous tools provided an all-in-one jailbreak solution for almost all iDevices but nothing can be ensured till users can download limera1n or any official information is released.
Update 2: Kaatje has managed to jailbreak 4.0 on iPhone 3GS. This tool is expected to jailbreak iPod Touch 4.0 as well. It may be released by iPhone Dev Team as Pwnage Tool 4.0 but nothing can be assured until Pwnage Tool 4.0 download is available