そゆもの。英語版。（追記(0:50)日本語版他もダウンロードできます。kamegawaさん多謝）

Windows 7 / Server 2008 R2 – Service Pack 1 (SP1) Beta Availability – Ask the Performance Team – Site Home – TechNet Blogs

In order to download and install SP1, you must have a valid RTM version of Windows 7 / Windows Server 2008 R2 already installed. This beta is intended for the IT Guru, so home users will be out of luck.

To get more information and download SP1 for yourself, please check the following links:

Download Windows 7 and Windows Server 2008 R2 Service Pack 1 (SP1) Beta

http://technet.microsoft.com/en-us/evalcenter/ff183870.aspx

Windows 7 Server Pack 1 Downloads

http://www.windows7news.com/2010/07/13/windows-7-service-pack-1-downloads/

NOTE The SP1 Beta does not provide new end-user features, and installation is not supported by Microsoft.

Until next time…