This article is a nice wrap up of the new features of the new A4.  Looks like they managed to stretch the wheelbase about 6 inches and added a total length of about 4.5 inches.  They made the backseat something you might actually want to sit in!  They added about 2 inches of knee space for the back seats.  Of course it has the new B8 body style and they are saying it is a great mix of the A5 and the A6.  They have also added a selectable suspension on the fully packaged version.  I still have my eye on the A5 but nice to see some of these updates come to the A4.