This sample shows how to use a simple Sequential Convoy inside an Orchestration. This can be used inside an Orchestration for sequential message processing.
This sample will work in BizTalk 2004 and BizTalk 2006
Get more information from the original blog post on this topic: http://www.biztalkgurus.com/biztalk_server/biztalk_blogs/b/biztalk/archive/2004/08/23/sequential-convoys-in-biztalk.aspx