Visual Studio LightSwitch was created to help make building application faster and more accessible by providing pre-configured screen templates, code and other reusable components. You can use Visual Basic.NET or C# if you need to write custom code. Data sources supported will include Microsoft SQL Server, Microsoft SQL Azure, SharePoint, Microsoft Office Access (post beta), and other third party data sources.
The Visual Studio LightSwitch Beta will be available on August 23.
check it out – http://www.microsoft.com/visualstudio/en-us/lightswitch and