FYI - here are three new soap articles from IBM developerWorks.
A simple SOAP client
This article describes a simple, general purpose SOAP client in Java
that uses no specialized SOAP libraries. Instead of creating the SOAP
request XML document for you under the hood, this client lets you
create your own request with any XML editor (or text editor).
Web service invocation sans SOAP
How WSIF scores over the current client programming models for Web
SOAP security extensions: digital signature
Discusses how SOAP-DSIG is related to SSL, and describes how the two
technologies complement each other.
Digital signatures for SOAP messages
This tutorial explains how to digitally sign and encrypt your SOAP
messages for security.