For those of you that have access to the SQL Server 2008 distribution via the various channels, please pay attention to the Microsoft KB article which will likely apply to your installation experience until Visual Studio 2008 (Orcas) SP1 has shipped: http://support.microsoft.com/kb/956139

Basically, if you want to install SQL Server 2008, go ahead. If you want to install SSIS, SSRS, SSAS, and a few other tools, you’re going to have to wait until VS 2008 SP1 has shipped and is installed on your machine before going through the SQL Server 2008 setup. Also note, that the warning in the KB article appears quite late in the SQL Server 2008 setup process, so you have been warned!