"Use Autodesk products to efficiently and effectively create more sustainable building designs. Whether a new or retrofit project, incorporate Revit, ImageModeler, Green Building Studio and Ecotect to improve the future energy cost of building projects."Register
For those of you who currently own Revit Architecture 2011 Suite and/or Revit MEP 2011 Suite, you do have the ability to utilize Green Building Studion through your Subscription. For more information, log into the Autodesk Subscription site.