I just finished a Frontier-SOAP interop test suite which implements the same
methods as the services listed on the XMethods Interop Test Lab page[1]

Unsurprisingly, with Frontier or Radio UserLand as the client, all the tests
pass:

http://jake.soapware.org/stories/storyReader$13

I also posted a set of pages with request/response wire-dumps, with Radio
UserLand 7.0 as the client, and Frontier 7.0b26 as the server:

http://jake.soapware.org/xmethodsInterop/wiredumps

I'm interested in hearing what success people have, using other client
implementations to call these Frontier test methods.

The service is at http://www.soapware.org:80/xmethodsInterop, though making
a request to any path on port 80 on soapware.org should work.

Use "/xmethodsInterop" for the value of the SOAPAction HTTP header (quotes
are optional).

If you have problems or questions calling the service, please reply to the
list.

Thanks,
-Jake

[1] - http://www.xmethods.net/ilab/ilab.html