Chaps,
This picture just in courtesy of Germany's Auto Motor und Sport. I think it looks great. They report two engines being available from launch, a 3.2 litre FSI V-6 and a 3.6 litre FSI V-6.
According to my own information, it is almost certain that a 4.2 litre V-8 FSI will be available pretty soon after launch if not at launch. Developing 350-380 bhp, it won't be the engine from the RS4, but I've heard that the 420 bhp engine will come later in an RS5.
The styling is remarkably faithful to the Nuvolari concept, with a few nips and tucks to keep it fresh.- but also to differentiate it from the TT. As mentioned, this is a brand new chassis based on the next A4, so it should have decent legroom for rear passengers.
Note forward stance of front wheels due to engine being mounted further back. Expect Torsen 3 (60% of power to rear whhels and DSG. You knew all this already. But nice to have it confirmed. A definite alternative to the 3-Series coupe. Comin' atcha in late 2007...