My company builds outdoor kitchens and living spaces. I've been pretty fortunate to work on some pretty fun projects, like built in bbq's:
And outdoor fireplaces and patios (built the wood box out of firebrick in herringbone pattern):
My current project on the go is an Italian Style wood fired brick pizza oven. I downloaded the free plans from www.fornobravo.com
There is a forums there and pretty much all the information needed for people to build their own.
Information I have gathered about the ovens, temps can reach 800+ degrees, cooking temperatures can be maintained for 12+ hrs (you can bake bread the morning after a fire) and cook a pizza in two minutes.
My motivation: