diagnosis of mental illness would be complicated...

the wikipedia entry for "mobile phone" includes this bit of brilliance...
Speculative improvements in the future may be inspired by an English team led by James Auger and Jimmy Loizeau who in 2002, developed an implant designed to be inserted into a tooth during dental surgery. This device consists of a radio receiver and transducer, which transmits the sound via bone conduction through the jawbone into the ear. Sound is transmitted via radio waves from another device (ostensibly a mobile phone) and received by the implant. The implant is currently powered externally, given that no current power source is small enough to fit inside the tooth with it. In addition, the implant was only designed to receive signals, not transmit them. Directly tapping into the inner ear or the auditory nerve is already technologically feasible and will become practical as surgical methods advance.

wouldn't this lead to folks talking to themselves a lot a lot?