I think it was three years ago that I last did an interview with Julie Lerman on Entity Framework. At the time, it had just released version 2.0 and started to take up the fight against NHibernate. Now, three years later, I wonder what's happened since then? Does Entity Framework maturity in a good way, or has it been abandoned by Microsoft? The short answer is that Entity Framework is alive and well and that it is now open source.