My slacker low tech approach is to temporarily run it out of a slightly cracked glove box. The glove box door seems to stay and look closed. I stuff the cord between the dash and the padding to clean up the look. Lastly leave it in the space to the right of the steering wheel. I leave it stuffed temporarily and rotate ends and adjust length of the cable to keep from crimping the same spot to over and over again.
Sure, it's rough but it's not hanging down around the shifter in case I need to make a floor shift. I also leave enough cable at the iPod end to allow me to hold it at the steering wheel and make easy program changes.