UI Stencils just released a new and very useful tool to aid Windows Phone 7 developers. The stencil was co-created by the actual Windows Phone 7 development team and it allows developer to quickly and easily mock-up app ideas on paper with ease before they ever sit down in front of their keyboard. The kit includes a high quality stainless steel stencil, Zebra mechanical pencil, Plastic protector and 2 UI Stencils stickers to get you started.