As more and more social app directories launch, data concerning the most shared and recommended mobile apps is beginning to emerge. We recently wrote about Chorus, an iPhone app that helps you discover other apps, which revealed the most recommended apps from their community. Today, Mplayit, a recently launched Facebook app that allows users to discover, share and recommend a variety of mobile apps, is releasing a list of its most shared apps on the iPhone, Android, BlackBerry and Mobile (Java) devices. Mplayit’s directory of apps includes a dedicated page for each app where Mplayit will post videos of the app (created either by the developer or pulled from YouTube), a detailed description of the app and reviews. You can also click to buy the app from various app markets, including Apple's App Store and the Android Market. Once you start clicking on various app and downloading apps, Mplayit will begin to recommend apps to you based on your behavior on the site. And you can share apps on Facebook and Twitter. The Facebook page also shows the activity that’s taking place in other app marketplaces, such as Apple’s App Store or the Android Market, to show users what apps are receiving the most downloads, reviews and more. Users will also be able to see the “apptivity” within their social network, so they can clearly see what apps their friends and family are most interested in.