The Commerce Server 2007 Partner Software Development Kit (SDK) is now available for download (registration required).
The Partner SDK contains the modifiable source code for the Commerce Server Business User Applications (Catalog Manager, Marketing Manager and the Customer and Orders Manager) which connect to the various Commerce Server web services.
Even if you don’t need to modify these applications for your customers (if you’re a consultant) or for your company, the source code is a great place to learn more about how these web services are called and used.
Way to go guys!