Daily construction work should not start before 9am and the estimated completion date is 2nd March 2012. (Thanks to John Miller for the photos)
Update on 19 March: Some more recent guest photos (see http://www.disboards.com/showthread.php ... st44363512) show that work is a little behind schedule, and is looking like it will be completed nearer to the end of March.
13 March, the section nearest to the main lobby is pretty much done now, and some of the walls are down:
Update on 17 April: The work was completed a while before Easter, a couple of weeks behind the original schedule. Here's a photo from DISer 'pixarmom' of the finished courtyard: