For casinos:

American Gaming Association This is the website of the AGA which describes its position in detail.

Mass. Speaker: Casino bill will spur jobs, revenue (Business Week) A bill in favor of casinos and slots was introduced into the Massachusetts House of Representatives on April 1, 2010.

Against casinos:

United to Stop Slots in Massachusetts This is the homepage of the movement (USS Mass) to prevent the legalization of slot machines in the bay state.

Close Call Counts: Neuroscience of Gambling Addictions (Scientific American) This article explains that gambling becomes addictive because of the way it affects positive reinforcement processes within the brain.

Decision making as a predictor of first ecstasy use: a prospective study (20 November 2008) An intriguing study which reveals that there is a connection between the decision making strategies of gamblers and the likelihood of drug usage.