After talking to iH8sn0w it is evident that the port can be done it is just the legality that is in question. iH8sn0w can not distribute modded Apple files without a legal issue and therefore must make it work from the ipsw. This will require a bootrom exploit working with the iPhone 4s. Like greenpois0n this will be hard to find and there is a good chance that it will not appear anytime soon. Until then everyone without the iPhone 4S will be without siri.
Here is a demo thanks to steven and 9to5mac.com
As most iPhone 4S units were sent all around the world, most of the users were very excited about Apple’s new voice assistant, Siri. Siri is probably the most important new feature to come to the new iPhone. Many people questioned if the great new assistant could be ported to it’s predecessor, the iPhone 4. I bet you anything that Apple could have done it, but they just wanted people to buy their new product. I personally think it would have taken almost no time for Apple to port it into the iPhone 4, better yet, the iPad 2. Siri would have been a more logical choice due to the new A5 processor. Well, there is great news, recently the Sn0wbreeze founder and jailbreak hacker iH8Sn0w has tweeted some very important information about this process of Siri being on the iPhone 4…
But even with this statement, there could be a chance that this project will take a very long process. Hackers have not released a release date for this project, but it sure looks like we can definitely get our hands on Siri.