http://channel9.msdn.com/posts/LauraFoy/Windows-Phone-7-Apps–Tools/

Windows Phone 7 Program Manager, Sean Mckenna, swung by the Channel 9 studio to give us a demo of some Windows Phone 7 applications. The idea is that these are some core applications, for which the source code will be made available HERE, that developers can integrate into their more complex and intricate original applications. Check out what he’s offering and get to developing!