As he signed a law easing prohibition, President Franklin Roosevelt reportedly quipped, "I think this would be a good time for a beer."

Is our recession-plagued present a good time for a joint? Legalizing, taxing and regulating marijuana, would pull the rug out from under pot dealers in urban America, and create a crisis for them, but it would likely prove a boon for state budgets. In an oft-cited 2006 report on U.S. marijuana production, expert Jon Gettman used "conservative price estimates" to peg the value of the annual crop at $36 billion--more valuable than corn and wheat combined.