Normally this site is helpful, but I don't see anything scheduled:
http://www.commissionegaranziasciopero.it/
On the left hand menu, click the bottom item, "elenco scioperi"
Scroll down to "transport aereo" (air transport), "Trasporto Ferroviario" (train transport), "Trasporto Pubblico Locale" (local public transit).

Remember, they use the European date format, so 02-08-06 is Aug. 2nd.

It might be too recent to be listed. There are news stories, like this one stating that they are planning a 24 hour strike of three unions: Anpac (commercial pilots), Anpav (flight attendants) and Avia (I think those are pilots)... and maybe Sult (transport workers).

Sult's website also talks about a 4 hour Sept. 18 strike at FCO, but that has a more limited target.