App categories are Microsoft’s way of organizing applications so that users can more easily find what they are looking for. For Windows Phone 7, there are 41 categories and sub-categories to help organize applications for users. When you submit your app to Marketplace you can choose from one of the categories below to help users find your app. Apps can only be placed in one category. Books & Reference - eReader - Fiction - Non-fiction - Reference Business Entertainment Finance Games - Action ......
Playing with the emulator: The WP7 emulator actually does a lot more than just run your games from VS 2010. If you want to make use of some of the “hidden” features of the emulator, you need to run it separately from VS 2010 and use some of the command line options. If you open up a command line window and navigate to C:\Program Files (x86)\Microsoft XDE\1.0 you will find a program called XDE.exe. Run that and you will get the this popup showing the available Command Line Options. This by itself ......