Just announced on technet.com SP available here is the page you need:
Service Pack 1 (SP1) for Windows Server 2008 R2 and Windows 7
Service Pack 1 (SP1) for Windows Server 2008 R2 and Windows 7 helps keep your PCs and servers on the latest support level. It provides ongoing improvements to the Windows operating system (including previous updates delivered over Windows Update and incremental updates to the Windows 7 and Windows Server 2008 R2 platforms based on customer and partner feedback) and makes it easy for organizations to deploy a single set of updates.
Download SP1 for Windows Server 2008 R2 and Windows 7
- From Windows Update
We recommend customers use Windows Update to install the service pack, as it will provide the best experience.
- Standalone Version (x86 and x64)
Order a Windows 7 SP1 DVD
Deploy Windows Server 2008 R2 and Windows 7 with SP1
- Deployment Guide for Windows Server 2008 R2 with SP1 and Windows 7 with SP1
Get technical information, procedures, and recommendations for installing SP1 in a business or corporate environment.
- Installing Windows Server 2008 R2 with SP1
Find more information about Windows Server 2008 R2 with Service Pack 1, including steps to take prior to installation and details about installing and uninstalling the service pack.
- Microsoft Deployment Toolkit (MDT)
The Microsoft Deployment Toolkit provides a common console with the comprehensive tools and guidance needed to efficiently manage deployment of Windows 7 and Windows Server 2008 R2. MDT 2010 is the recommended process and toolset for automating desktop and server deployment.