Besides the integration of a Silverlight designer into the IDE, there were a couple of announcements that sneaked into the Keynote. First support for configuration files for multiple environments (dev, stage, uat, production). Second, Visual Studio's UI will be rebuilt using WPF. Scott Guthrie demoed a custom WPF extension for VS2010, that not only rendered the comments from methods in a very user friendly way, but also added extra functionality to retrieve WorkItem information from TFS.