Carbon nanotube radios

I had a long chat with an old friend the other day (Jesse of Geek Club fame), somehow we manged to get onto the subject of carbon nanotube radios and brain implants. I imagine it is only a matter of time until someone figures out how to deliver these in pill form and target them to specific regions of the brain by attaching some sort of protein sorting domain... Then a little tweak with the right frequency when you walk into the supermarket will send you on a shopping binge without limit or control. Perhaps it could be put into vitamin pills ;)