1. Visual Studio 2008 SP1 is already in a beta and can be downloaded from
here2. if you just want to download .NET 3.5 SP1 beta, it can be downloaded from
here3. Lot of enhancements and bugs fixes have been done. Overview of the same can be seen at
here4. There is a dedicated Microsoft forum for VS 2008 SP1 beta and can be visited at
hereIf you are one of the Vista users using VS 2008, and want to download the VS 2008 SP1. There are some issues related to installing .NET 3.5 SP1 on Vista RTM so better recommended approach is to install the SP 1 of Vista before installing VS 2008 SP1.
Read the complete post at http://dotnetpathak.blogspot.com/2008/05/working-with-vs-2008-sp1-in-vista.html