With all the concerns, be they alarmist or otherwise, that cell phones cause bad things to happen in your head, does a model that transmits sound through bone seem like the best idea?

There's a Japanese company that's selling just such a model, intended for use where noise makes traditional cell phones difficult to use. You apparently hold the phone to your forehead, and a port on the phone transmits a signal that the skull bones transmit to the cochlea. You plug an ear, and you can hear the call.

Apparently the technology is already in use in Japan in standard phones, and are popular with the elderly as they can hear the "bone phone" better. I think I'd opt for the TTD/TTY, thanks.