Windows Vista Team Blog has just officially announced Vista SP1!
What is SP1? What is it not?
In addition to updates we’ve previously released, SP1 will contain changes focused on addressing specific reliability and performance issues we’ve identified via customer feedback, supporting new types of hardware, and adding support for several emerging standards. SP1 also makes additional improvements to the IT administration experience. We didn’t design SP1 as a vehicle for releasing new features; however, some existing components do gain enhanced functionality in SP1.
More information on what’s included in SP1 can be found in the detailed white paper.
According to the same page, the SP1 of Vista should be released in the 1st quarter of 2008.