“Entity Framework 4.0 will use T4 (Text Template Transformation Toolkit), which makes customizing Code Generation easy, flexible and powerful, and the experience is also fully integrated into Visual Studio.”
So flexible that you can generate all you want ?
Hopefully, soon, NHibernate will have even a graphic designer fully integrated with VisualStudio to generate mappings and classes and directly developed by Microsoft.
Awesome how things are changing, no ? ;-)