Last week, Brian Keller, Visual Studio ALM Principal Technical Evangelist @ Microsoft announced that OData access for Team Foundation Service has been enabled.
Developers can now write applications for multiple device types (such as smartphones and tablets) and operating systems which interact with projects on both Team Foundation Server (using the downloadable OData Service) and Team Foundation Service (using the Team Foundation Service OData API hosted by Microsoft).
Are u interested in TFS and mobile application development using this cool service? you can read more about it here http://blogs.msdn.com/b/briankel/archive/2013/01/24/bringing-odata-to-team-foundation-service.aspx
Cheers! // Suliman