Microsoft has released Visual Studio Lightswitch 2011 RTM(Release to Manufacture).
Visual Studio LightSwitch is the newest edition of the Visual Studio family and is the simplest way to build business applications for the desktop and the cloud. For the end-user developer this means you can quickly create professional quality business applications with minimal code.
For the professional developer you can customize LightSwitch with your own code, controls and even build extensions that can add more capabilities than what you get out of the box.
read more on MSDN Team blogs..