How much is an Italian dollar bill worth?

Answer 1

there is no such thing as an Italian dollar, the Italians have never dealt in dollars only Liras and now Euros

As of today Sept 15, 2009, the exchange is:

1 Euro = 1.4658 U.S. Dollars

This is assuming you are looking for the U.S. Currency.

Answer 2

Italy uses the euro as its currency, not the dollar. The euro is the official currency of Italy and one euro is equivalent to about 1.13 US dollars.