Facebook Credits are fast becoming the official currency of developers everywhere. Following recent announcements involving LOLapps, CrowdStar, RockYou, and Wooga, Playdom has also entered a deal that will see it using nothing other than Facebook Credits for the next handful of years. Playdom is an important developer, with millions of people enjoying its apps. By establishing a deal with it, Facebook's ensured that a whole lot of folks will be exposed to Facebook Credits.