Hello Mark,
I am using ArcGIS Java Webservices jars that ESRI provides to make SOAP calls to the ArcGIS services on the Server from Java code running on a Jave Enterprise Edition Server.
I couldn't find a specific forum for ArcGIS Java Webservices (using ArcGIS Server 10.1), but do move it if there is a more appropriate forum so that I can get help on this.
Thanks,
Kiran