Microsoft has released the final Windows 7 and Server 2008 R2 SP1 bits to the public:
Windows 7 and Windows Server 2008 R2 SP1 helps keep your PCs and servers on the latest support level. It also provides ongoing improvements to the Windows Operating System (OS), by including previous updates delivered over Windows Update as well as continuing incremental updates to the Windows 7 and Windows Server 2008 R2 platforms based on customer and partner feedback. This enables organizations to deploy a single set of updates.
For those interested, the updated Windows 7 SP1 Automated Installation Kit (AIK) is available here.