Oregon's failed exchange launch has been one of the most intriguing stories of the Obamacare rollout, and we now know a lot more about what went wrong after Gov. John Kitzhaber today released an independent review of the state's enrollment Web site. While HealthCare.gov overcame major tech problems and has been running pretty well since early December, Cover Oregon still hasn't managed to launch an online enrollment portal. That's even though the state was awarded more than $300 million in federal grants and was one of first states to approve an exchange. The $228,000 review, ordered three months ago, was based on interviews with 67 stakeholders and more than 3,200 documents.