Fantastic Lad sends us to Wired for a story on the upside of nicotine. Researchers are developing drugs based on nicotine that may prove beneficial for brains, bowels, blood vessels and immune systems. "Nicotine acts on the acetylcholine receptors in the brain, stimulating and regulating the release of a slew of brain chemicals, including seratonin, dopamine and norepinephrine. Now drugs derived from nicotine and the research on nicotine receptors are in clinical trials for everything from helping to heal wounds, to depression, schizophrenia, Alzheimer's, Tourette Syndrome, ADHD, anger management and anxiety." A separate story talks about nicotine warding off Parkinson's disease.