The Centro di documentazione sulle popolazioni e le culture italiane nel mondo (Centre for Documentation on Italian populations and cultures in the world), set up by the Giovanni Agnelli Foundation in 1993, offers three separate data banks containing the transcription of the information contained in the passenger lists of the ships that arrived in New York, Buenos Aires and Vitoria (Italian nationals only).

For more information see:
http://www.italians-world.org/Italy/BancaDatiGb.htm