In “What’s New for SQL Developers in Visual Studio 2008 SP1,” InstantDoc ID 101173, William Vaughn covers data access and reporting features in Service Pack 1. Here’s a list Microsoft provides of other new and enhanced features in Visual Studio 2008 SP1:
Smart Device Projects Occasionally Connected Applications Power Packs Controls and Components DataRepeater Control Line and Shape Controls PrintForm Component Printer Compatibility Library Distributing Power Packs .NET Framework Client Profile Support
For more information see the Microsoft site, What's New in Visual Studio 2008.