Visual Studio LightSwitch is a new tool aimed at building data-driven applications, like an inventory system or a basic customer relationship management system incredibly easy.   LightSwitch automatically generates the user interface in Silverlight for a data source and, with no code, you can create, read, update and delete data. Watch the demos and see how you can build, customize, and extend LightSwitch applications including changing themes, templates, adding custom validation, providing smart data types, and deploying to Windows Azure. The free, public beta will be available starting August 23rd.