Do you know Channel 9? Awesome place to learn about new technologies, there are great videos and one of this is about Entity Framework. Rowan Miller and Diego Vega of the Entity Framework team show us in two videos parts about the concepts of Code First, Database First and Model First. If you are looking for to know more about Entity Framework take a look on this videos:
Visual Studio Toolbox Entity Framework Part 1
Visual Studio Toolbox Entity Framework Part 2
Developer Center – ADO.NET Entity Framework