There should be a special Nobel Prize set aside for geniuses who find ways to improve the simplest things in life. And this year's award would go to Shapeways user OliveBird, whose Button 2.0 turns any shirt into a convenient headphone wrangler.
It's not to say that the traditional button design isn't useful. It's just that with the addition of a subtle clamp on one edge for holding headphone cables no thicker than two millimeters, the Button 2.0 is approximately a thousand times more useful. And this isn't some design student's thesis on how to make the world better. It's an actual product you can order from Shapeways in different colors ranging in price from $3 to $4. Expensive for a button? Yes. But this is the bleeding edge of shirt fastening/cable wrangling technology.