Update: I cant get over how timely this topic is. Here is an article from Rolling Stone
(The quote is from the first link)
So much of the marijuana debate used to be about morality; now it's mostly about economics and practicality - which is why New Hampshire, Massachusetts, and Rhode Island are also floating measures to legalize and tax; why similar voter referendums are in the works in Washington state and Oregon; why 14 states (including, most recently, New Jersey) have legalized medical marijuana, and why even Pennsylvania, hardly a pacesetting state, is weighing the sanction of medical pot, complete with 6 percent sales tax