How do I configure ASP.NET MVC routing to hide the controller name on a “home” page?

Try this:

   private void RegisterRoutes(RouteCollection routes) {

      routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

      routes.MapRoute("default", "{controller}/{action}/{id}",
         new { action = "index", id = "" },
         // Register below the name of all the other controllers
         new { controller = @"^(account|support)$" });

      routes.MapRoute("home", "{action}",
         new { controller = "device", action = "index" });
   }

e.g. /foo

If foo is not a controller then it’s treated as an action of the device controller.