I'm looking for a web service testing framework that has a good built in text input / output gui. The point would be for business and other non developer users to be able to test requirements by using a simple gui that they could enter values into and see the results from the web service. I have seen lots of references on Stack Overflow and the web to great developer web service testing tool but a nice, built in, I/O gui is the key feature for me.
By web service testing I mean a tool that sends xml post requests over HTTP and tests the response.
I have been trying out fitnesse but to use it I need to cut out parts of the system and I very much want to do end to end testing. The way fitnesse displays its results is great but the wiki data entry is a bit clunky for business users imo.