Microsoft.com preview site
http://preview.microsoft.com/en/us/default.aspxIt looks like Microsoft is using parts of the Atlas framework to replace the navigation menu with a site guide. The guide collapses, expands, and opens an inline div layer with links and image preview to the other sites on the Microsoft.com network. The rotating arrow icon as you collapse and expand is a cool detail.
While I think the redesign and addition of Atlas are a nice touch overall, it looks like there is much more work for this preview site. It only works on IE at the moment and will redirect you to a 404 page in Firefox. The transitions seem sluggish.
Microsoft.com Preview
Current Microsoft.com
