We have a new technology preview that allows form finding for architectural conceptual design. Think of it as working as you would with Maya but you are still in AutoCAD. The project gets its name from the Nucleus technology in Maya that has been ported over to AutoCAD. An earlier technology preview experimented with this in Revit. You can download this technology preview for AutoCAD 2012 from the Autodesk Labs site:
Physical phenomena simulation is once again alive in the lab.