BUG
Lists the numbers of various lost property offices in the city.
http://www.bugeurope.com/rome/info.html

Columbus Guides
Contains a brief note on the left luggage facilities at Fiumicino Airport.
http://www.worldairportguide.com/airports/fco/fco.asp

Holiday in Rome
Find out where to go to find items lost on Rome's buses or metro system.
http://www.holidayinrome.com/information/news.asp?category=53

Roman Homes
Details the left luggage facilities at Rome's main train station.
http://www.romanhomes.com/your_roman_vacation/train.htm

US Embassy
Advice on how to cancel lost/stolen credit cards, airline tickets, travellers checks and student cards when in Rome. Aimed at Americans, but useful to all.
http://www.usembassy.it/cons/acs/stolen.htm

US Embassy
Contains the details of lost property offices in town.
http://www.usembassy.it/cons/acs/useful.htm