We haven't found any great pizza in WDW either. Don't forget, Connecticut has some pretty excellent pizza as well...New Haven is famous for it, but where I live we are more influenced by New York style. There is also a LARGE italian population around here (at LEAST 20 different pizza places within 2 miles of my home!!!).
From what I recall however the two BEST pies I've EVER had in my life were from New Haven (not Pepes, but a small local joint I can't remember the name) and in Hoboken, NJ at "Five Star" pizza (Hoboken is a very hip little city BTW).
WDW is better for "California-style" pizza, i.e. "flatbreads" at California Grille and Wolfgang Pucks in my opinion. But for the real deal, you have to head for the tri-state area of NY, NJ, and CT.