Autodesk updated the recently acquired Green Building Studio. This web service integrates sophisticated engineer’s tools with architectural design software and enables architects to evaluate the energy use of their designs.
Part of the update is a tighter integration with the 2009 line of the Revit platform. The external application was added to the Tool pull down menu. The second part of the update is the web client application for all other software exporting gbXML files. (e.g. AutoCAD Architecture 2009, MEP 2008 + 2009, Archicad, Demeter SketchUp Plugin, …)

Found on bimology.blogspot.com