Buffon
Thuram - Kovac - Cannavaro
Camoranesi - Emerson - Vieira - Zambrotta
Ibrahimovic - Trezeguet - Mutu
Not as outlandish as some of the formations in this thread, however I would run something like this if I was the coach.
This is basically a 3-4-3 that will sometimes shift into a 4-3-3 depending on the situation. We would start out with three at the back, a solid group of some of the better defenders in the world. In this formation Zambrotta would have free roam on the left flank, given special orders by me to watch his positioning on defense, and if we are ahead I would restrict his forward runs a bit. The trident in attack would be given freedom to do whatever they want, however I would expect Mutu to drop deeper back into midfield to pickup the ball.
This formation covers all areas rather well, especially causing trouble for the opposition's defense with pressue from the wings and middle of the pitch. Emerson and Vieira would shield the defense, and Thuram would basically turn himself into a RB. As you can see this formation can easily adapt to it's enviornment and can take many shapes or forms.