Apple decided to release the next generation iPad without full Siri functionality. Instead they only included voice dictation, a cool feature, but not the full experience. This being said, Andrew, a writer for the site discovered that the iPad 3 connects to the same servers as the iPhone 4S does. This means that porting Siri to the new iPad should be simple as it may only require Spire set to this address (https://guzzoni.apple.com).
Unlike the older devices new iPads will have their own key and should work fine with Apple’s servers. This being said, we won’t know for sure until the device is jailbroken. I0n1c’s exploit has jailbroken the new ipad on 5.1 untethered and will hopefully be available for others soon (more info).
Below is a screenshot of the DNS requests when using dictation on the new iPad.