Following up on the practical notes on impractical things, here is one on a practical thing as well:
Autodesk is now officially supporting Apple Boot Camp for users of AutoCAD, 3ds Max, Inventor and last but not least the three flavours of Revit. Boot Camp is a component of the Mac OSX operating system that enables customers to run Windows on the Mac. See www.autodesk.com/mac for more general details and this FAQ for some frequently asked Revit specific questions and hardware requirements.