Why would a company upgrade to the new MS Office 2007? This WSJ article discusses the technology, and while the conclusion is positive, MS has created a “steep learning curve”. My favorite quote:

The entire user interface, the way you do things in these familiar old programs, has been thrown out and replaced with something new.

And another:

As if this weren’t enough, Microsoft has also changed the standard file format for Office files. Older versions of Office, on both Windows and Macintosh computers, won’t be able to read these new file types without special conversion software.