Just watched a presentation that I found very enlightening:

At work we have Office 2003 and at home I only use Koffice or but I find how they got to the new ribbon in Office 207 quite interesting, the stats of how commands used in office that they fed into design are interesting.

The idea of letting people have a sense of mastery over the software is good and how this put into practice with design.

It has got me thinking more about other applications which I allready had views on how needed to change.