If you remember, Marshal McLuhann argued that movable type altered the way our central nervous system worked. So it's not suprising that neurologist Susan Greenfield thinks that psychoative drugs and computers are altering the ways our brain works. She's worried about a number of things happening. Here's her very interesting article. I've wondered myself if we're not expecting psychoactive drugs and technology to make us better than human, and if that's not a bit Promethean.
Any thoughts from the other post-humans out there?
In a related note, Mark Bauerlein thinks that technology is actually making this "the dumbest generation" (in America, it should be noted). The Boston Globe lays out his argument in an article that is, ironically enough, dumbed down to about the People Magazine level of prose.