Windows Vista Service Pack 2 is officially available for download.

Improved support for Wi-Fi and Bluetooth, an updated file indexing and search system, native support for recording Blu-ray discs, etc. - if you are a user of Vista SP1, you can download the second service pack from the official Microsoft website right now:

Vista SP2 (32-bit version) 348.3 MB
Vista SP2 (64-bit version) 577.4 MB

Through the automatic update system, the service pack will be available at the end of June.