Aside from the whole riding around with sound-distraction thing, are you certain that mounting something to your helmet like that is safe? Might it compromise the crash-design of the helmet? I know there's been quite a bit of debate about helmet-mounted lights too.

I used to do quite a bit of bmx riding with an anti skip cd player in my pocket before mp3 players came about......then shortly after they became affordable I would ride with an armband mounted mp3 player....

my main music choices have always been The Action Is Go by Fu Manchu or any other cd from them or any mix of any kind of punk....

I ride with moderate volume so that I could still hear cars around me, but mostly I just rode trails on my mtb and bmx street.....so its not like I was around cars often....

I perfer not to ride with headphones because i would liek to hear whats happening for exampel if theres a police car comming then i would just avoid it but going on the sidewalk and stopping for him to pass by me.

later (selling z150fr $650cdn)

I Do. But It's more NPR than music. Sorry, I'm an egghead ;-)

Use a Cheapo Walkman.

I clip a $30 radio walkman sideways onto my Camelback. It's been dropped and banged so many times. I'm AMAZED that it still works.

BTW, RIO has a nice line of rugged MP3/FM players out there right now. They're probably perfect for mountain biking. Make sure you get the Sony buds that wrap around the ear and hold them in place.

why the heck would i use a walkman if i have an mp3 player?