Using yeast scares me. I'm always afraid it won't proof, or my dough won't rise. I love yeast breads, but I'm just terrified of making them. It's an awful lot of ingredients wasted for a batch of dough not to rise!
Still, iced buns are delicious things, no matter what form they take. I love cinnamon rolls myself, along with honey buns. Those are so good!
I'm thinking yeast-based doughnuts would qualify as iced buns. They may be fried, but they're still yeasty and iced with good things. My favorite are maple glazed doughnuts. Those are just too, too good.