Read the original article by Michael Washington at LightSwitch Help Website
One tool that you can use to browse your LightSwitch in Visual Studio 2011 Beta OData feeds is LinqPad. Another one is theSilverlight OData Explorer.
You can run the OData Explorer from this link:
http://www.silverlight.net/content/samples/odataexplorer/default.html
(Note: The LightSwitch OData feed is the address of your LightSwitch application with /ApplicationData.svc/ at the end)