Microsoft has released a new demo app in Windows Phone Store to demonstrate the capabilities of Windows Phone App Studio. This example App is built using Windows Phone App Studio http://apps.windowsstore.com and it showcases many of the features available to App Studio users.The features includes ability to include various data sources, use different layouts, use action items, customize backgrounds for your apps and more.
Windows Phone App Studio lets anyone build apps for immediate publishing with very little effort. Visit http://apps.windowsstore.com/ for more details.
Download the demo app here from Windows Phone Store for free.