Just got a pair of these Bose Accustic Noise Reducing Headphones.
They really work great. I wore them on a recent trans-Pacific flight and it was like being in another world. All the white noise was gone and the music was so clear. I even wore them without the music on just to kill the noise.
Anyway, it occurred to me that these are just the ticket for bicyclists who are intimidated by traffic and the frightening sound of motorists coming up from behind and zooming around you.
Can't wait to try these babies in heavy traffic!