I don't expect Lippi to do something at the world cup.
The Italians had a great generation but all of them are either retired or they'll be in their mid 30's in 2010. (Cannavaro, Del Piero, Nesta, Totti, Gattuso, Inzaghi, Toni, Materazzi, Zambrotta, Grosso,Pirlo etc)
The younger players, except Giovinco and Chiellini, aren't even close to being good enough to guarantee Italy a medal at the WC.
If Lippi continues with the old guard he'll certainly fail at the WC. If he introduces more young players he won't have enough time to create a winning team, and like i said, they aren't good enough to become a winning team.
Lippi made a huge mistake. He left the NT as a winner and he was going to stay remembered as a winner. But everything will be forgotten when he'll be eliminated in the groups or in the last 16 round.
He should have taken a club to manage, not the Italian NT.