One of the most interesting things you can do with the iPod touch is using it as a remote control for other devices that is why some created remote control applications.
The entire device was rewired to allow the owner to start the car, open the doors and trunk, roll down the windows, control the radio, the car alarm and even the engine. The range of this is limited because the communication is through bluetooth. What makes this car different from other remote controlled; it can be controlled via voice commands.
It is conceivable that an iPod touch could replace the fanciest of universal remotes and it is worth a try for all the hobbyists out there.