The Windows Vista Service Pack 2 standalone package has been released for public download.
Unlike previous Windows service packs this is NOT cumulative.
Service Pack 1 is required to be installed BEFORE Service Pack 2.
32 Bit:
Download details: Windows Server 2008 Service Pack 2 and Windows Vista Service Pack 2 - Five Language Standalone (KB948465)
64 Bit:
Download details: Windows Server 2008 Service Pack 2 and Windows Vista Service Pack 2 - Five Language Standalone for x64-based systems (KB948465)
For those who prefer not to download the whole package, Vista Service Pack 2 will be released to Windows Update in the coming weeks.