Cosmetic Neurology - your brain on steroids

Are brain enhancers safe? Are they ethical? Do they really work? Is this one step toward the treatment of Alzheimer's or just another way to enhance performance? What are the long term consequences? There is an article in Nov/Dec 2009 issue of The Pennsylvania Gazette, "Are Better Brains Better?" about the use of drugs to enhance performance. Weigh in with your comments!