Microsoft has released the latest service pack for Vista and Server 2008 and it is available to be downloaded from the microsoft website.
Windows Vista and Server 2008 SP2 standalone installer (x86)
Windows Vista and Server 2008 SP2 standalone installer (x64)
For me its a bridging gap between Windows Vista SP1 and Windows 7 (release date Oct, 22, 2009). I have installed it and there is not much significant difference in the overall performance of Vista. For some it can prove to be improvemnet in performance but according to my personal experience, i would suggest the users to wait for Windows 7 release rather than installing Vista SP2.
