There is a good sample of using SSO to store application configuration information. Particularly useful for BizTalk projects.
http://download.microsoft.com/download/b/1/d/b1d9ddf9-88c6-4d4e-abea-4787fdc85bec/appmgmtusingsso.exe
Other useful BizTalk 2006 SDK examples:
http://msdn.microsoft.com/biztalk/downloads/samples/