There were some questions in the comments in the last few days about working with the Ribbon minimized (which I do a lot,
Microsoft Office Professional Plus, but not exclusively). In a nice piece of chance timing,
Buy Office 2007, Jensen wrote a short piece (UI blog) on how the Ribbon has been improved in this area post-beta. Please check it out: https://blogs.msdn.com/jensenh/archive/2006/07/20/672345.aspx.The post includes a short movie so you can see the auto-collapsing behaviour he explains in the post.