Could this be the World's Largest Slice of Pizza? That's what this guy claims. While it looks pretty big, I'm not sure that it's bigger than this one. Although, we never found out what that one was, and it is in NJ. Maybe we've solved the mystery of the "God Bless American Giant Pizza?!?!? (can anyone confirm?)
From: http://www.youtube.com/watch?v=oqYOKkDy5rQ
Muncher Ed Ruggieri attacks the World's Largest Slice of Pizza, offered by the Sawmill Cafe in Seaside Park. The legendary bar is celebrating 30 years on the boardwalk. The pizza's not bad. (Video by Pete Genovese)
SupersizedMeals.com
http://www.supersizedmeals.com/food/article.php/20080603-Worlds_Largest_Slice_of_Pizza