Useful links:

Rome: http://www.romaturismo.it/v2/it/main.asp

Vatican: http://www.vatican.va/phome_en.htm

Meteo:
http://it.weather.yahoo.com/

Airports of Rome
http://www.adr.it/Default.asp?L=3&

Trains
http://www.trenitalia.com/en/index.html

Atac
http://www.atac.roma.it/