Facebook announced plans to develop the App Center, which Facebook says will provide users with high-quality apps. According to ReadWriteWeb.com, "Facebook has announced a strict set of style and quality guidelines to get apps placed in App Center. Apps that are considered high-quality, as decided by Facebook's Insights analytics platform, will get prominent placement."
This stance is a change from less than a year ago when company reps said they had no plans for a Facebook "app store." Facebook will also allow paid apps, further increasing Facebook revenues. There is, however, a long list of restrictions and requirements.