Primo: From what I've heard, he is going to stick with the players that won him the U-21 European Championships. In other words, no over-23 players.
Although this is probably a good way to preserve the chemistry the squad currently has, I would love to see R. Baggio get the chance to win something significant with the azzuri (and Maldini as well). These guys deserve it! Even if Tardelli wanted Vieri, he wouldn't be available. The word is that he won't be fit for Italy's WC 2002 qualifier against Hungary on September 3. He will be training without the ball for the next 6-8 weeks (running only).
Anyways, in the end I don't think it will matter because the Italians will win with or without over-23 players.