I don't think DP will play, while Pippo most definately will. I agree that he's not the BEST striker (or among the BEST stirkers), but he's curretly the most effective and has done well for Italy since EURO.
Vannuchi... He's playing in SERIE B!!!! He will certainly grow to be a likely NT feature at some point, but honestly....
How much did Montella play this season ?
I agree on playing Vieri (at least for one half) because he's so awesome when he's in real good shape, and he needs to get back in the team. What has he done this season though ?
Only really obvious players : Nesta, Canna, Maldini, Totti, Fiore.
Apart from that I'm undecided, although Tommasi might have earned himself a spot due to his impressive season. It could also be Giannichedda partnering Fiore like with Udinese or SURPRISE Tacchinardi

. Allow me at least one quip in favor of my Juventus

. I see no reason playing Albertini or Di Biagio. They're both "competent" but they're running the tight rope and Ambrosini should be infront of both of them as should the afore mentioned players.
Right midfield is a fight between Zambrotta, Damiano Zenoni and Gennaro Gattuso in my book. Note that I'm excluding Conte due to the same reasons as Di Biagio and Albertini.
Left midfield: Coco has played well with the NT- very inconsistent with Milan. Zauri has been the bomb at Atalanta. Hard to find anyone else I think as Pessotto shouldn't play anything but wing back in a 4 man defence.
Italy aren't really gifted with that many left sided wing players.
Forwards: I believe Pippo will be first choice actually, while Vieri, Chiesa, Delvecchio, Del Piero, and Montella are behind him.
Buffon has been better than Toldo so far this season.
My line-up
____________Buffon___________
___Cannavaro Nesta Maldini___
Zambrotta Fiore Tommassi Coco
_____________Totti___________
__________Pippo Vieri/Chiesa_
Ciao.