Since Applidium revealed how Siri worked and how the requests were being sent to Apple’s servers, plamoni set up his own server and created his own custom handlers to perform tasks that Siri would normally not be able to do. In this case plamoni managed to get Siri to check on the status of his thermostat as well as adjust its settings all from his iPhone.
The project can be downloaded from GitHub although it definitely does not look like something your average iPhone user will be able to get up and running. However if you’re a developer and you have some experience with matters like this, perhaps you might want to take a look at plamoni’s Siri Proxy project on GitHub. In the mean time us regular folks will just enjoy the video demonstration below and dream of the possibilities.