According to the latest blog post by P0sixninja and Unlock to the iPhone 3G will be available. a member of Chronic Dev Team, he will be releasing an Jailbreak Download for iPhone OS 3.1.3 and iPhone OS 3.1.2 for all iDevices by the end of April and Unlock iPhone 3G 3Gs 2G. As far as unlock iPhone 3G 2G 3Gs will be available on 4.0 firmware, you have to wait until Next Generation iPhone 4G is released. He further added that many people think that Greenpois0n is an exploit, infact its not an exploit but toolkit which helps the hackers to discover and exploit new vulnerabilities.
He said although the tools like Redsn0w and blackra1n use same exploits to Unlock iPhone 3G at the backend but still they don’t provide enough flexibility nor advanced capabilities that we were really looking for. On the other hand Greenpois0n is a powerful tool which when injected into the iBoot, adds many powerful commands which allow you to do everything from accessing the AES engine to decrypt firmware keys, hook and call into existing iBoot functions, read and write to blockdevices, including the filesystem, and even set breakpoints within iBoot to dump registers and stack information during runtime.
As far as Spirit Jailbreak of iPad is concerned, its far from being impressive pieces of work as such Jailbreak can be easily patched by Apple in its next firmware update. As the exploit resides in userland, you have no access to low level hardware features. On the other hand iBoot exploits allows you to have full access to system files.
He said the his team won’t release the iBoot and Spirit exploit until the next hardware version of iPhone arrives but he guaranteed the exploit by the end of this month through which you will be able to Jailbreak iPhone OS 3.1.3 / 3.2 (All Devices – All Models).
Hopefully the limera1n jailbreak is getting close for GeoHot to release!