Microsoft has just released the first beta build of Visual Studio LightSwitch to MSDN subscribers. You can find it at the MSDN download site under the "New Downloads" section and then under "Visual Studio 2010". The full DVD image download is 507MB.
For more information about LightSwitch visit the Microsoft LightSwitch page. Watch the keynote presentation where, Jason Zander, Corporate Vice President, Visual Studio, announces a new addition to the Visual Studio product line. There are also couple of other videos that go a bit further demonstrating the product, but they all deal with exactly the same scenario so they repeat a lot of stuff.
LightSwitch is a new developer tool that makes creating business applications easy. In many ways it is like Clarion for SilverLight. We are looking forward to taking a good look at this too during the beta cycle and I am downloading beta 1 as I write this!
Arnor Baldvinsson