Yikes! Bruce Schneier, Cryptogram Newsletter: "Implementation of Microsoft SOAP, a protocol running over HTTP precisely so it could bypass firewalls, should be withdrawn.". You gotta be kidding me. Wonder how the rest of the SOAP community feels about this? [Peter Drayton]
Microsoft SOAP? Chosing to refer to the W3C Note in those terms speaks volumes about the author's intent.
I tend to run SOAP on port 5049. Those digits look kinda like the letters SOAP to me. Depending on your security requirements, you are free to run SOAP on any port you like.