SiriSn0w does the same thing as other custom firmware creators like Sn0wbreeze, but it installs Siri alongside Cydia. It also installs the new corona untether by pod2g. So you can turn on your device without a computer.
In addition to SiriAuth, @StanTheRipper also released AuthGrabber. This program allows you to easily obtain the iPhone 4S keys with your server. Just connect your iPhone 4S to your server and use Siri. The authentication files will automatically be copied into a textfile and you can then either add them to your server or to your older iOS device directly.
Requirements for AuthGarbber:
An iPhone 4S
A UNIX system (Linux, Mac)
Port 53 and Port 443 are open on your computer firewall and your router firewall (If you’re doing this from your home PC)
@StanTheRipper released his modified version of plamoni’s SiriProxy. It allows you to easily set up your own server. You can then take the keys from an iPhone 4S and add them to your server. That way you can use Siri with older iOS Devices.
@StanTheRipper, the developer of Sirisn0w, recently tweeted that he organized some Siri files. Two hours later he tweeted that Siri almost works. Like you see in the picture on the left, Siri now tries to establish a connection to Apple’s Servers, but it doesn’t yet succeed. Siri now also talks to you.
StanTheRipper also tweeted that he can’t release the files due to copyright issues (Read chpwn‘s blog post for more details). This means that we may not see Sirisn0w being updated in the near future.
StanTheRipper uploaded a video showing the current state of his port on the iPhone 4:
@StanTheRipper released SiriSn0w, a package for Cydia that will install the Siri UI on your iPhone 4. I still would NOT recommend installing this package or any other Siri UI, as it doesn’t connect to Apple’s servers and therefore is useless.
WARNING: There are a lot of people who report that their phone is stuck while respringing. I would wait to install this package until all the bugs are cleared out.