A lot of folks have been asking for this so we thought we would give a shout out to Progress DataDirect who released some ADO.NET EF providers for connecting to Oracle, Sybase and DB2 directly from Visual Studio LightSwitch. (Note that these providers do not work with LightSwitch in VS11 Beta at this time, they are meant to work with Visual Studio LightSwitch RTM – Version 1).
Check out their walkthrough to help get you started: Getting started with Microsoft Visual Studio LightSwitch to Oracle, Sybase, and DB2
Questions/comments? Let them know.