Augmenting Senses

For the cyborg fans among us, it appears that science is on the cusp of integrating technology with human information processing. It's on a limited scale, at the moment, but if you're familiar with the D20 gaming system Shadow Run and the novels the game has spawned, then you're familiar with the concept of hardware implants designed to let human consciousness mesh with computer generated visualizations. The questions (and therefore story points) just keep popping up. At what point do technological enhancements turn a human into a cyborg? What happens to the human brain when the admittedly cool tech like that detailed in the article linked above makes it so that our brains no longer have to learn to operate on a spacial basis? Is there inherent mental/physical benefit - beyond being able to find your way from point A to point B - in having to learn how to read a map or visualize your city and your position therein? Can something as simple as a pair of glasses giving directions really influence how humans evolve? In what way? Aren't there at least a thousand stories in this single article? I have mine. The third, as yet untitled, book in the Enemy series (Enemy Within, Enemy Games - from Berkley Sensations in November 2010 and Spring 2011) includes a heroine using technology to enhance and sometimes to compensate for her senses. What's your story?