As a developer of both Nokia and WIndows Phone 7 we wanted to share this stencil library we created for Omnigraffle.

Use these librarys to help layout and organize the design of apps. If you need to get familiar with this mobile operating system this is a great way to experiment and play with the UI elements. We have even added 3 color themes to choose from. Feel free to explore and come up with your own windows phone 7 app.

Download it here:
http://www.marlinmobile.com/blog/?page_id=285