Microsoft officially released SP1 for Windows Vista.

Windows Vista Service Pack 1 (SP1) is an update to Windows Vista that addresses feedback from our customers. In addition to previously released updates, SP1 will contain changes focused on addressing specific reliability, performance, and compatibility issues; supporting new types of hardware; and adding support for several emerging standards.

Windows Vista Service Pack 1 Five Language Standalone version can be installed on systems with any of the following language versions: English (US), French, German, Japanese, or Spanish (Traditional).

The SP1 for Vista is hopefully a major step forward to make Vista more desirable to switch from XP.
Download Vista SP1 here. Via Engadget.