Jan Van Ryswyck talks about fluent domain methods for setting up complex aggregate roots and for implementing behavior on domain entities.
Jérémie Chassaing shows how Service Bus pattern can help in DDD with code reusability.
Ayende talks about decomposing an application into features as a way for separating different application functionality and to allow independent development.
Julie Lerman shows how in EF 4.0 the function mapping feature is improved as the conceptual space also gets the function allowing it to be called from the entity directly and not through EntityClient. She also points out a bug when using T4 template instead of EntityModelCodeGenerator for CustomTool mode. Another great article is about the major improvements in EF 4.0 for working with complex types.
The Entity Framework Design team talks about the Code Only enhancements that will be available in the next release.
Alex James how to use T4 templates for generating entities that have regular expressions applied to them. He also continues his tips series :
Don Smith has an excellent about the usage of Model View ViewModel (MVVM) pattern and how to cleanly separate the View from the ViewModel in different scenarios including data bindings, animations, commands and parameters.
Sean Chambers has a great series about code refactoring.
Oleg Sych talks about the customization of the TFS Process Guidance with T4.