I was actually thinking about patenting this idea, (True story),
now I suppose I can't anymore. In any case:
" imagine, if you will, having a beeper in your rectum or genital area, the most sensitive area of your body. And your beeper numbers displayed on billboards throughout the city."
sounds like fun to me!
In any case true or not, we are going to have things like this soon enough. Not implanted, but self implanted. The whole point is to have ways in which you can receive informations directly into your body (literally), and connecting it with anything you want.