Over at Wonkblog, Christopher Ingraham passes along the results of a new study about where people sleep the best and the worst. It turns out I’m in pretty good shape: Orange County reports generally excellent sleep. But if you live in the Insomnia Belt, stretching down the Appalachians from West Virginia into eastern Texas, you may be in trouble. Why? Apparently no one knows. But it might explain why they’re so cranky these days.