A great article on WaPo. I ‘highly’ (pun intended) recommend it.

”To explore what that legalization might look like from the vantage point of a decade in the future, The Washington Post’s Michael S. Rosenwald pored through reams of government, academic and corporate studies, and talked to experts on marijuana, drug legalization, Prohibition and marketing.

This, then, is a reported fantasy, a look at the State of Pot in America in 2020, based on research conducted in 2010.”
http://www.washingtonpost.com/wp-dyn/content/article/2010/10/22/AR2010102205573.html