This is the first release of Green Building Studio after the recent Autodesk acquisition and it brings a few changes. The most noticeable one is tighter integration with the 2009 line of the Revit platform via the External Application addition to the Tool pull down menu.
The second update is the client application for all of the other BIM platforms that can produce gbXML files. Therefore, AutoCAD Architecture 2009 and MEP 2008 and 2009, as well as ArchiCAD users will still have to submit their files outside of their applications.
I almost forgot, black is the new green as the Green Building Studio web interface has changed to resemble the ADSK home page.