We've heard of crowdsourcing slogans, t-shirt designs, and writing. But pizza? That's exactly the case with Streetza. This award-winning food truck serves up both slices and whole pizzas that have been hand-stretched and baked in its 650-degree oven. And while the usual suspects like cheese, pepperoni, and sausage are available, the truck also serves up its special slices of the day, the ideas for which come from its Twitter followers. This unique idea has spawned pies topped with everything from spam to crab legs, which are sold alongside slices topped with the best stuff from the city's neighborhoods.