Randy,
I do not believe that this feature will be added to Integration Server until the 7.0 release currently scheduled for about one year from now (Spring 2007).
In the meantime, the best you can do, IMHO, is to use a tool like XML Spy Enterprise Edition to handcraft the WSDL. I have also had some success with the new Eclipse WSDL editor that comes in the Web Development Toolkit (WDT).
My approach (based roughly on the approach outlined by Thomas Erl in his book), is to identify service candidates and design messages for each operation in each service candidate using XML Spy.
Once I have a schema element for each input and output message, I create a WSDL for each Service and define each operation which references a request and reply message element.
This is fairly tedious, but if you use an xs:import statement to import your message definitions and any other common data strutures, your WSDL files can be modular and will not, themselves, need to be updated unless you add operations or change operation names.
Mark
#API-Management#webMethods#soa