The Word team has started up a new blog, and Jon Bailor has made the first introduction post: http://blogs.msdn.com/microsoft_office_word/ archive/2006/09/15/756756.aspx

I've talked with Jon, and he's really excited about giving folks some insight into the thinking that went on in the design of Word 2007. Jon is relatively new to the Word team (a little over a year), so he's also able to give a bit more of an outsider's point of view to some of the designs.

-Brian