The Commonwealth Fund has published a progress report examining state action to implement health insurance exchanges, as required by the national health care reform law.  The report outlines the law's requirements and briefly explains proposed rules governing the exchanges.  The authors also provide a state-by-state breakdown of action to establish exchanges.

From the report: 

Today, the Department of Health and Human Services released its new proposed regulation providing states guidance on establishing new insurance exchanges. The Affordable Care Act requires each state to establish by 2014 a health insurance exchange where individuals and small businesses can purchase affordable health insurance plans. The exchanges are the centerpiece of the reform law: they will be the main portals for people without employer-sponsored or public insurance to both find a health plan and learn about and apply for any federal subsidies for which they are eligible.  Up to 30 million people are expected to enroll in health plans through their state exchange by 2020, either on their own or through their employers. And to the extent that eligibility and enrollment in Medicaid and the Children’s Health Insurance Program are also determined through the exchange, the number of people coming to the exchanges for information about coverage could rise to more than 80 million. 

Full report: State Health Insurance Exchange Legislation: A Progress Report

Commonwealth Fund.  (2011).  State health insurance exchange legislation: a progress report.  Collins, S. and Garber, T.