Ahead of the previously communicated release date (supposedly Wednesday, August 19th), Windows Server 2008 R2 is available to TechNet & MSDN subscribers as well as organizations w/ an EA agreement with Microsoft.
Windows Server 2008 R2 Overview (link launches PowerPoint download)
Top 10 Reasons to Upgrade to W2K8 R2 (link launches Word download)
Congratulations to the Windows Server Product Team!!!