We've heard plenty about the perils of cellphones in general and text messaging in particular, but are there some instances where it might actually be good for your health? Well, sort of. Some researchers at the University of Oregon and a few other participating institutions have now found a way to pinpoint the areas of the brain that are most active in controlling the urges to smoke, and they say that information can also be predictive of real-world behavior and the individuals' ability to respond