Here is a Expression Blend project for sharing XAML based resources for creating consistent Windows Phone 7 user experiences. The templates are based on the UI Design and Interaction Guide for Windows Phone 7 and Design Templates for Windows Phone 7 (a collection of 28 layered Photoshop template .pdf files and the Segoe WP font family for use in application layouts and UI development). With these templates you can easily create common Windows Phone UI layouts by simply copying and pasting the desired page. The Blend team has taken care of the margins, styling, and custom controls that may not be available in the platform.
With Expression Blend, open the project and the WP7 Design Templates.xaml and MainPage.xaml pages should be opened by default. The WP7 Design Templates.xaml page displays all of the available templates in one page. By running the project (F5), you can browse through all of the available templates via the Windows Phone 7 Emulator.
You can download the templates here … http://wp7designtemplates.codeplex.com/