I think they're called "arinchini" (little oranges) and I remember seeing them on Molto Mario for the first time several years ago. He used the term "telephono" to describe them, because the melted cheese, when pulled apart, looks like telephone lines.
I hope somebody out there either validates or corrects this because my memory's a bit thin on this.
By the way, you can use leftover risotto to make "pancakes", too- you can sandwich some cheese in them, panfry them and oh boy! They get crispy and yummy.