This is one cool hack and I am sure more to come. Apparently, developers have been digging the Siri and understanding how it works. With some magic, they were able to control a remote Thermostat by commanding Siri via a proxy server.
With the right command, Siri is able to activate the server to perform some task on the thermostat. For example, Siri can response to questions about the temperature of the thermostat, changing the thermostat settings and etc. Here is the video.
If you are adventurous enough, you can check out the code.
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