MOSS 2007 and Commerce Server 2009 Architecture

High-level Commerce Server 2009 architecture:
http://msdn.microsoft.com/en-us/library/dd452198(CS.90).aspx

MOSS 2007 and Commerce Server 2009 Architecture
http://social.msdn.microsoft.com/Forums/en-US/commserver2009/thread/8153e2ca-d51f-433f-895c-0de861d3fc6d

Build & Deploy Commerce Server Extensibility Kit for SP2007