Gizmodo is reporting that with a single line of code and a few modifications Siri will work on other Apple devices. They claim it is only limited however do not specify how limited. I am also sure that Apple will be quick to fix this. Keep in mind that this is different than just modifying the iPhones software and having it work as long as you don’t update. Siri requires access to Apples servers and they will probably patch something on the server side to stop access.