I've found a VERY happy medium!

I DO NOT WEAR HEADPHONES

I use the loadspeaker function on my Nokia 6280 (which is alos my MP3 Player) and ride home with that. I listen too my music but it's ALWAY's instantly drowned out by an approaching car. It's in my back pocket of my jersey on my commute.

Headsets ARE dangerous for pedestrians, cyclists and motorists alike.