http://developers.de/blogs/andreas_lehmann/archive/2008/08/13/what-s-new-in-sp1-for-visual-studio-2008-and-net-3-5.aspxHere is a shortly description (only the highlights are listed here) about the new or improved features which were delivered by SP1: Visual Studio 2008 SP1 delivers : Improved WPF designers SQL Server 2008 support ADO.NET Entity Designer Visual Basic andenCommunityServer 2008 SP1 (Build: 30619.63)