Concluding my investigation of Flash MX used as a consumer of SOAP Web Services:

Security issues ('across domain data access') are main problem in connecting Flash MX to any WebService located in a different domain then the SWF. Can't use sendAndLoad etc.

• workaround #1: server-side script (PHP/ASP etc) makes call.
• workaround #2: use JavaScript + XMLHTTP on webpage with SWF
• workaround #3: Macromedia's Flash Remoting. same as #1. Mmmm, i think i stick to PHP/NuSOAP for now...  All XML-stuff in Flash is still a pain in the neck. Maybe for ColdFusion & JRUN buffs -  this is not for me. I like PHP!

Guess workaround #1 is the beter solution, considering one has to fiddle with IE's security settings to make workaround #2 work.