I can't believe more people have not bellyache'd about this. I have been a long-time Mac User; and can use the most demanding of CAD software out there (including Autodesk Alias); I find theses extra strings attached to Microsoft very disconcerting; and it reminds me why I have stayed away from Windows for so long. Microsoft's Licensing Stratedgy has proven thier disregard for their own customer's; as long as there's a chance to hold them over a barrel.
Since I am not an accountant; or a writer, I have never been compelled to spend money on Microsoft's Office offerings. I am perfectly happy with Open Office for any of the basic needs I may have for these types of programs. Autodesk would do well to open the gates to using Open Office for spreadsheet intergration, as well as maybe others; so that new features that roll out for the new products on the OSX side of things are easily available to any who would like to use them . It would seem that Fusion; and 123D are sinmple steps towards Inventor on Mac: I hope that Inventor does make it to the Mac Platform; and that many of the Legacy "Dependancies" will be thrown to the side with more "open" options.