GM Europe has a highlight article on the new 2009 CTS Sport Wagon up.
GM Europe’s article has an intro write-up, then rather more coverage on the Cadillac BLS, which is of course currently available in Europe.
Click on the ‘more’ button and you get more info on the CTS Sport Wagon:
The CTS Sport Wagon, due in showrooms from summer 2009, rides on the same 2,880mm wheelbase as the CTS Sedan, but offers a generous cargo area of 720 liters behind the rear seats. Further design highlights include new 19-inch wheels and the option of a large panoramic rear sunroof.

2010 Cadillac CTS Sport Wagon rear
I am confused as to whether the Sport Wagon will arrive in time to be a 2009 model or not. All good either way. I did not pick up on the switch to 19″ wheels, which may be very popular.