Just saw the following hit MS Download Center. Something tells me we will be pumping a few Tera (Peta?)-bytes of data over the next day or two...
Windows Vista Service Pack 1 Five Language Standalone for x64-based Systems (KB936330)
Windows Vista Service Pack 1 Five Language Standalone for 32-bit Systems (KB936330)
Windows Vista Service Pack 1 (SP1) is an update to Windows Vista that addresses feedback from our customers. In addition to previously released updates, SP1 will contain changes focused on addressing specific reliability, performance, and compatibility issues; supporting new types of hardware; and adding support for several emerging standards. SP1 also will continue to make it easier for IT administrators to deploy and manage Windows Vista. Windows Vista Service Pack 1 Five Language Standalone version can be installed on systems with any of the following language versions: English (US), French, German, Japanese, or Spanish (Traditional).
Read the overview of Windows Vista SP1, including what's new, technical details, guidelines and notable changes.
Read the Deployment Guide for Windows Vista SP1. This guide includes technical information, procedures, and recommendations for installing Windows Vista SP1 in a business or corporate environment.
DO NOT CLICK DOWNLOAD IF YOU ARE UPDATING JUST ONE COMPUTER: A smaller, more appropriate download is available on Windows Update. To download the Standalone version of Windows Vista Service Pack 1 please follow the directions below in the Instructions section.
Before installing SP1, please visit the Windows Vista TechCenter and read the page "Things to Know Before you Download Windows Vista SP1"
The Microsoft Download Center site is your only authorized web source for downloading a licensed copy of Windows Vista Service Pack 1. To report a website offering unlicensed copies of Windows Vista Service Pack 1 for download, please send e-mail to: email@example.com or visit http://www.microsoft.com/piracy/ReportingUs.mspx.