Commerce Server 2009 is now available for MSDN Subscribers. This is discussed further at this post .
There are a number of resources also detailed at the link above and these include the following.
- Readme and Installation Guide.
- The Default Site Performance Guide.
- Multi-Channel Foundation Samples.
- The Partner SDK.
To go along with this release you’ll see that the main Commerce Site has been updated at http://www.microsoft.com/commerceserver and we’ve got some other resources available.
The new Commerce Server 2009 forum is here .
If you’re going to MIX09 then there will be a session about Commerce Server 2009 as discussed here.
And finally one of my colleagues has written up a quick installation guide for Commerce Server 2009 developers which you can see here.