The official source of product insight from the Visual Studio Engineering Team
As of today, Visual Studio 2010 SP1 is now available through Microsoft Update. If you have opted into Microsoft Update and haven’t installed SP1 yet, you will soon have it offered to you. The service pack was initially released in March and includes some often requested feature improvements, fixes that improve reliability as well as the most commonly-reported customer bugs.
For more information, check out the following blog posts and links:
Jack UnverferthThe Visual Studio Professional Team