The Papa’s Specialty Pizza Challenge tasks Facebook fans with creating the winning recipe for the company’s next specialty pizza. Creating a new pizza through the application is pretty simple - as a user you can name your pizza as well as select the crust thinkness, pick the sauce and add up to seven toppings. The resulting creation is then posted on Papa John's page where other fans can like or share your pizza creation. In my mind this is very clever because it means that each individual pizza creation is easily shard with literally thousands of people.