- The document discusses new features in Visual Studio 2008 SP1 including Silverlight and ASP.NET controls, AJAX improvements, ASP.NET routing, Dynamic Data scaffolding, and performance enhancements for WPF applications. - It also covers new pixel shader effects in WPF, DirectX interoperability, additional controls like the WebBrowser, and the .NET Client Profile subset. - Resources for learning more about .NET 3.5 SP1 features are provided on the ASP.NET website.