This is HUGE! This means you can now scuplt freeform objects in Maya and export in DWG format. That means there is now a viable means to get your Maya objects into not only AutoCAD but also Revit.
Download it from Autodesk Labs
Be sure to actually READ the read me file included with the download as it includes instructions on the desired path to export geometry from Maya and get it successfully into Revit. Be sure to note that the desired surface in Maya needs be to constructed of NURBS for proper transfer into Revit.