This sample shows how to modify a BizTalk Web Service to submit Xml Documents into BizTalk and route them using direct binding. The key to routing the message submitted by the Web Service is to make sure the Receive Port uses the Xml Disassembler pipeline.
This sample will work with BizTalk 2006 and BizTalk 2006 R2.
Get more information from the original blog post on this topic: http://www.biztalkgurus.com/blogs/biztalk/archive/2006/03/14/How-To-Use-SOAP-to-Submitt-Xml-Documents-Into-BizTalk-Server.aspx and http://www.biztalkgurus.com/blogs/biztalk/archive/2006/03/14/Working-With-Untyped-Web-Services-in-BizTalk-Server.aspx