nothing wrong with being revolutionary, but I think you are overdoing it a bit. Your defence and keeper, that is fine for a start. Buffon in my opinion is Italy's best keeper, and nesta cannavaro kinda pick themselves. bonera I've heard is good player, so your defence is great.
The midfield, marchionni, on the few times I have seen him, has looked very impressive, so I'm not going to dispute his name, even though personally i would start Zambrotta, due to his good world cup. To my knowledge, donati is a central midfielder, is he not? as such, putting him on the left would make the team a bit unbalanced IMO.
I have not seen brighi play enough to comment, sadly, so you get away with that one :d. Maresca is super, i really like this guy, but is he ready to perform the vital holding midfield role for the national team? this is a different matter, i would probably go for a more experienced head out there.
Pirlo over totti is fine by me, totti is a wanker.
Your strike force, put Del Piero in there somewhere, and maccarone/cassano could be a good partner, though again, turning down a fit vieri would take some going!