An Italian site scenarieconomici.it has "Plan B" for leaving the Euro. This is being referred to as Paolo Savona's plan, though I haven't been able to confirm more than the fact that he contributes to the site. It isn't very impressive, using as examples the breakup of Austria-Hungary, Czecheslovakia and the USSR, which all happened before large-scale computerization. Section 2 talks about the need to keep the plans secret, which means that Savona (if this is his plan) should have been involved behind the scenes, not become a public figure.