You can make Siri do all kinds of things it was never designed to do. From installing it on older jailbroken iDevices to using it to bypass an iPhone's lock screen, people have managed to come up with some interesting hacks—and that's only the beginning.
Raspberry Pi Forums member DarkTherapy used Siri and, you guessed it, a Raspberry Pi, to hack his iPhone into a garage door opener.
Check out the video to see it in action, as well as photos of the setup.
You can find more details along with all the code and relevant links over on the forum thread.