This is pretty much as good as it gets for being able to hear your Bluetooth headset. The only issue I can see, is that if you are in a noisy enough environment where you need bone conduction to hear, then there is no way that the person you are talking to will be able to hear or understand what you are saying.
It does have dual mic’s, one directional, one not, which should help with that problem though. And even if it doesn’t, the headset is supposedly still good for those with hearing disabilities as bone conduction works a little differently than sound waves.
No word on price or availability, but it seems to be Japan only, so I wouldn’t expect it to hit stateside any time soon. I can’t wait till they make one of these bone conduction Bluetooth headsets complete with the piece that goes on your neck for conducting your voice direct from your voice box, then you could go to a Lamb of God concert and be able to have a clear conversation, granted you might look a little weird, but I’d rock it.
NTT DoCoMo Sound Leaf+ Bone Conducting Bluetooth Headset [via Unwired View]