Apparently Autodesk realized that their idea of one integrated Revit model was not going to work in reality. They were trying to push this idea of linking all the Revit models together, which seems like a great idea until you realize in a real world size project that Revit struggles enough with one discipline, the computers are just not up for the task yet.
Now Autodesk can scrap that idea and push everyone to get NavisWorks (I'm sure the Archicad users are cringing at this acquisition)
BTW this is my first post using Windows Live Writer, so far I really like it, very simple and intuitive.