Just made pizza yesterday, and this pops up on Facebook today. Just might have to give it a try.
How to reheat pizza. Because it's true, the microwave does ruin it.
Update: Gave it a try and it heated really well, although it took a while to get the toppings nice and hot, so I'm not sure it's any faster than reheating it in the oven. But it did heat and the crust stayed nice and crispy.