In light of this story, I've got to thinking about how such devices apply to motorcyclists. I'm not interested in discussing cyclists this time - just want to talk about headphone type devices and their use by motorcyclists. Not interested in whether they should be illegal or not, either (personal responsibility yadayada). I've just purchased a bluetooth enabled intercom set and I'm really wondering whether I should use it for entertainment rather than 'driver aid' functions of GPS and rider to rider communication. I know plenty of netriders use them for music etc. - just wondering if you ever feel a bit compromised in terms of aural awareness? We already have to deal with wind and mechanical noise, and the muffling characteristics of helmets. FWIW I habitually pull to a stop to receive phone calls, so that's not really an issue for me.