As promised, Windows Vista (and Server 2008) SP2 ships in May

It's here, if you want it:

Methods to download the latest service pack

• Method 1: Turn on Automatic Updates (Recommended for most users)
• Method 2: Check for updates on Windows Update (Same as Method 1 but not automatic)
• Method 3: Obtain the latest Windows Vista service pack from the Microsoft Download Center (Good to use if the computer on which you want to install the service pack is not connected to the Internet)

Direct download links:

Windows Vista and Windows Server 2008 Service Pack 2, 32-bit versions Five Language Standalone package for English, French, German, Japanese, or Spanish (Traditional) (384.3 MB)

Windows Vista and Windows Server 2008 Service Pack 2, 64-bit versions Five Language Standalone package for English, French, German, Japanese, or Spanish (Traditional) (577.4 MB)