Universal infrared remote control
The Neo1973 should be able to feed IR leds connected directly to the audio output jack, with high enough frequencies, so that it can be used a remote control. This way, one can use standard .wav files to e.g. control the TV, stereo, etc.
The device is described [http://features.engadget.com/2004/07/27/how-to-turn-your-ipod-in-to-a-universal-infrared-remote-control/ here]