Since we support many different languages, we decided early on to not try to maintain 5+ versions of the SDK documentation and build a single language-neutral set of docs. The WSDL documentation does contain all of the docs so if you know of a tool that will build documentation based on WSDL you could go that route. Our server code is hand-rolled in C. Our documentation is derived from a custom build tool that reads our source interface definitions and generates the HTML based documentation as well as the WSDL, perl bindings, and various other language helper tools.
BTW, if you are going the java route, make sure you are using a newer version of Axis. Apache WS-SOAP does not contain support for multi-dimensional arrays which we rely on exclusively in the 9.x versions of the SDKs. Some of the built-in toolkits in vendors dev systems are based on the old WS-SOAP code. Use Axis, you'll be much happier in the long run.
-Joe
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