According to the guys at Engadget, Windows Vista SP1 (Service Patch 1) may be available as soon as tomorrow. Online stores such as Amazon already have SP1 versions on their sites.
For those interested in what Windows Vista SP1 is all about (from technet.microsoft.com):
Windows Vista Service Pack 1 is an update to Windows Vista that addresses feedback from our customers. In addition to previously released updates, SP1 contains changes focused on addressing specific reliability and performance issues, supporting new types of hardware, and adding support for several emerging standards. Windows Vista SP1 also addresses some management, deployment, and support challenges.
