Hi,
if you happen to be at AIA in Miami, and want to see cool modeling in AutoCAD and its potential for interoperability with Revit, please pass by Autodesk's booth, and I'll be glad to show you some amazing stuff.
I'm also doing a presentation on Friday at 4, cohosted with my friend Scott Davis, around AutoCAD - Revit interop when using AutoCAD as conceptual design.
See you there!