I can't give you specifics here, but I can say that if you stay away from restaurants in the touristy areas you'll be far better off...prices are up, and there's alot of creative waitering going on (service charges, higher prices charged)...see the New York Times site for specifics on what to watch out for (just search Rome food articles)...that said, Roman pizza is very different than pizza in Naples. Rome's pies are wafer thin, and drier than pies in Naples. Naples, in my opinion, offers the best pizza in Italy. You'll still get a really good pie in Rome, just not like its southern neighbor. If at all possible, make a day trip south to Naples, and go to Da Michele pizza. I think they are the #1 pie over there. Address: Via C. Sersale 1/3, Piazza Garibaldi, Naples, Italy
Have a great time, I'm jealous.