In the past couple weeks, I've refactored it to push the class/function reflection into Zend_Server_Reflection, and, in doing so, noted that there were further areas for refactoring into additional helper classes. Currently, it now has classes for the Request, Response, and Faults, and all actual XML wrangling is done in those, making the server basically XML-agnostic.
The refactoring of the code also had another positive side effect - it made it much simpler for him to write up the tests to ensure the correct functionality of the package. He includes an example of the use of the package, a fake request with various methods in the comb, brush, and pick categories.
If you'd like to mess with the extension yourself, check out the Zend Framework subversion repository and grab the latest incubation distribution.