ciao global.girl
I'm an expat living in Italy for some time. My Blackberry is happy on prepaid Vodafone Italy plan, with an additional cost of 3 Euro a week for Blackberry BIS option (includes 500Mb of data traffic weekly, and is necessary for BB services such as BB Messenger).
More info on Vodafone offer
here
There are other networks (3 Italy, TIM, Wind) but I don't use them. I'm sure other people will provide you with more info. 3 Italy is good in urban areas, don't know about rural coverage.
In general, mobile communication in Italy is expensive, customer care (for a non-Italian) is hard to deal with, especially if you don't speak italian
, calling plan advertising is often ambiguous, non-transparent and misleading and I can advise you to take things slowly, enjoy the 'dolce vita', italian style. Phone unlocking service is barely legal here so I would try online before coming here.