I don't know how I missed this one! But Guillermo Melantoni, the Senior Product Manager for Autodesk, has started a new blog dedicated to AutoCAD's 3D capabilities. This is a useful read for anybody working with AutoCAD and Revit, especially around the freeform.
In fact it was Guillermo who pointed me in the direction of this article posted on the Autodesk Area website, which shows the workflow improvements between 3dsMAX 2010 to AutoCAD 2010 and finally into Revit.
http://area.autodesk.com/index.php/blogs_ken/blog_detail/3ds_max_design_2010_improved_dwg_interop
