Valentin Stoychev from Telerik blogged about the availability of WP7 Page Transitions sample app.
Source: Telerik Blogs
With the first CTP of Telerik RadControls for Windows Phone 7 we introduced the page transitions. You can read more info about them in my blog post. Now with the beta1 release we created a sample application which you can use as a reference in order to add the Metro transitions into your application.