Commerce Server 2009 is now available for download to MSDN subscribers.
 
Commerce Server 2009 delivers the ability to increase your business reach by making it possible to sell via multiple channels by using an out-of-the-box shopping site, SharePoint® Commerce Services, and the Multi-Channel Commerce Foundation. The new out-of-the-box shopping site leverages SharePoint Commerce Services, which provides a gallery of ASP.NET 3.5 Web parts and controls, a comprehensive e-commerce shopping feature-set, and technology integration between Commerce Server and SharePoint technologies. The Multi-Channel Commerce Foundation provides a new unified, extensible run-time programming model for Commerce Server, including new run-time e-commerce capabilities. 
 
Download the following Commerce Server 2009 online materials today!
• Readme and Installation Guide
• Default SharePoint Site Performance Guide
• Multi-Channel Foundation Samples
• Partner Software Development Kit (SDK)

Commerce Server 2009 will be available to order from the Microsoft Price List effective April 1, 2009 through the normal Microsoft channels and Microsoft Volume Licensing Programs.

Note: Microsoft Commerce Server 2007 Enterprise Edition is also available for download to MSDN subscribers.