Manfred has announce the beta release of the Services_Webservice PEAR package today:

found some time to reactivate Services_Webservice and release the beta version. This package has been in alpha state since more then a year. You can download the version on the pear website. Additional information about the package are available here.

He also includes a few tests to give you an idea of how the package works - working with simple calls, class types, arrays, and class arrays.