In the Trastevere area of Rome there is a beer bar that serves what looks like good food, called bir & fud. When I was in Rome a year or so ago, I stopped there and had some really good Italian craft beer. They had taps and casks..good stuff. There is also a bar across the street that has other commercial craft offerings, including belgian and whatnot. One of those places might be good to check on to get an idea of the beer scene/homebrew happenings in the Rome area.
The bir and fud place has a blog:
Apparently there is a post talking about homebrew =)
Good luck. Italy is a cool place, and while I wasn't there for beer, the craft beer I had there was quite good.