If you are interested in a utility to test your web service, I would
suggest DigitForge's Visual Web Service Client application.
Completely eliminate the need to develop test harnesses, unless of
course that is a requirement
VWS has a free trial that you can download to test against your web
service. Can also check out the movie here: http://digitforge.com/downloads/vwsoverview.wvx
Hope that helps.