New Windows 7 Theme Pack Brings A Different Kind of Cloud to Your Desktop

We have just launched an all new series that teaches beginning developers with little programming experience how to develop applications for Windows Phone 7. This series assumes that they have absolutely no knowledge of C#, Silverlight, or mobile development. In just a few hours, they will understand the needed concepts to build applications.
i am interested in it!
early :)
im really interested in programing for this device. but i cant understand why to run the windowsphone emulator i need the WDDM 1.1?