Internet Explorer 7 is out, and one of the most noticeable changes is the absence of a menu bar. It still exists, but is hidden. Just press the Alt key and the good ol’ menu bar appears again.
For what it’s worth, I quite like the absence from a usability point-of-view. Office 2007 takes a while to get used to (most programs are missing a menubar, instead opting for a context-sensitive ‘ribbon’ of tools) but it’s definitely an interesting usability move. I have a feeling it’s definitely a love-hate thing though.