Hi Ali,
thanks for these suggestions.. Although neither if these is possible (with soapUI) right now, the new "Remote Project" feature in 1.7.6 (and latest snapshot) might at least help you out in your current setup; it basically allows you to specify a http(s) url to a project file in both soapUI (when importing) and for the command-line runners for executing tests in a central project file. So in your case you would at least not have to distribute updated project files to local nodes where tests are executed (if I understood you correctly..).
Hope this helps for now.. stay tuned :-)
regards!
/Ole
eviware.com