Information on tWSDL is here:
http://junom.com/document/tWSDL/
I believe that the software has achieved the specified goals for the server. The example API docs are a little old, but the example services work and are the best example of how to use the API. Also TWiST is an example of how to create a higher level API for a specific purpose, such as wrapping the database API.
tWSDL has a number of layered abstractions which are not fully explained in the documentation (yet). These abstractions will not likely change as they reflect the standards.
