More to Search
at Ancestry.com:

Hamburg Passenger Lists, 1850-1934
5 million Russians, Germans, Jewish and Austrians 80% destined for USA, Canada

Search Emigration Records
over 50 passenger list
& immigration databases
totalling more than 15 million names

Dutch Immigrants
to America, 1820-1880
over 56,000 Dutch immigrants on more than 100,000 passenger lists

US Federal Censuses 1790-1930
search the only complete
US census collection on the web;
over 550 million names

Genealogy Societies

American Italian Heritage Association  - New York
Anglo-Italian Family History Society - UK has transcriptions of Italians in UK censuses
Buffalo & Western New York Italian Genealogy Society
Club Pacentro of Detroit
Il Circolo Calabrese Il Circolo Calabrese is the world's oldest and largest organisation devoted to the study and preservation of the language, history, culture and genealogy of the Calabria region of Italy
Il Circolo Filippo Mazzei Washington DC metropolitan area Italian genealogical society
Italian Genealogical Society of America  - Massachusetts
The Italian Genealogical Group
Italian Heritage Society of Indiana
Santo Ippolito Genealogical Society