I posted an item on the Media Center Sandbox site earlier today that I wanted to make sure everyone sees, so I wanted to link to it here as well. We've released 2 new builds of the Windows Media Center SDK (builds 5456.5 and 5472.5) on the Microsoft Connect site. These SDK builds are designed to work with Windows Vista builds 5456.5 and 5472.5, which have previously been released on the Microsoft Connect site as well. Members of the Windows Vista beta program should have access to these builds of Windows Vista and the Windows Media Center SDK.
There is a description of some of the key changes in these new SDK builds on the Sandbox post. Please let us know what you think about these new builds of the Windows Media Center SDK by reporting bugs and suggestions and posting comments on the Media Center development forum.