No more custom controller factory! This will apply to you. They wrote a new IDependencyResolver that you implement and DependencyResolver.SetResolver(...). Your IoC will go through out the application.
http://weblogs.asp.net/shijuvarghese/archive/2011/01/21/dependency-injection-in-asp-net-mvc-3-using-dependencyresolver-and-controlleractivator.aspx
