According to an internal email from Microsoft, the XNA development kit is being discontinued and is not currently being worked on. Microsoft XNA is a development platform that many independent development teams used to create games for digital distribution. Many games like Fez, Basion, and Dust: An Elysian Tail were created using the XNA platform. It is sad to see a development tool like this be phased out since many games of that were created with XNA helped define Xbox Live and the indie game scene. Microsoft has not yet announced whether a new development tool is in production as a successor to XNA, but hopefully they are waiting for some conference or larger announcement to release more information.