If you are using a domestic oven, cooking your pizza on a terracotta tile with the oven on its hottest setting produces great results.
That's the ticket. It definately improves the taste the quicker the pizza cooks!
I use heston blumenthal's technique of heating an iron pan (like le creuset) to max heat, flipping it upside down, putting the pizza on the base of it and putting under a grill in a fully heated oven. Close the door.
Not the safest method but it gets temperatures far hotter than your oven can normally put out. My pizzas cooked in 90 seconds, from fresh, homemade dough.
Aparantly a proper pizza oven in italy should cook them in 90 secs, which is at 500c. They have guidelines for this now.
My pizzas were smaller so cooked quicker but the superheating from the red hot iron pan worked beautifuly. Nice mottled effect on the dough too. As tasty as a good restaurant.