Italy: North Italian Republic, South Italian Republic (Or break it into states again, Venice, Milan, Genoa, Florence, Papal Republic, Naples)
There's no way the GreatDuke of Tuscany could came back, or the pope
Here some suggestions:
Federal Republic of Italy: as concession to welthiers "regioni"
Federal Republic of Padany: the region of Veneto secedes (provinces of Venice and Belluno on DH map), with claims on Piedmont(Turin, Alessandria), Friuli Venezia-Giulia(Udine, Trieste), Lombardy(Bergamo, Milan, Brescia), Emilia-Romagna(Parma, Bologna), Liguria(Genoa). The last 2 regioni are very left sided, so it will be very difficult to these join Padany, the others are right sided, could join with very high dissent maybe
More info:
http://en.wikipedia.org/wiki/Lega_Nord but this party is losing support day after day so...
Sardinian Republic(all Sardinia island), SudTyrol Republic(Bolzano), Sicilian Republic(Sicily island): these cultural regions could secede on their own
Any news/idea about the economic system?