Direct neural interface has long been a dream and fantasy of tech geeks like myself who grew up reading science fiction. Slap an electrode net on your head (or screw a cable into an implanted jack) and there you are, controlling a computer with the same ease that you'd walk down the street or bend a paperclip with your fingers. If nothing else, those of us who battle the spectre of carpal tunnel syndrome constantly know that our careers have a shelf life, and at some point we're going to be out of action more or less permanently. So we …