Here's a brief overview of the new features of Windows Vista SP2:
Windows Search 4.0 for faster and improved relevancy in searches Bluetooth 2.1 Feature Pack supporting the most recent specification for Bluetooth Technology Ability to record data on to Blu-Ray media natively in Windows Vista Adds Windows Connect Now (WCN) to simplify Wi-Fi Configuration Windows Vista SP2 enables the exFAT file system to support UTC timestamps, which allows correct file synchronization across time zones.