Yeah, Anil Dash, you're right. Office 2007 is ballsy. I love using it and feel unproductive when I go back to the old version.
He totally nails why it's so hard to do something really different at a big company. Convincing everyone that you should change something big is a lot harder than it looks. My hat is off to the Office team. Interviewing Julie Larson-Green about Office is still one of my favorite videos.