NAV 2009 Web Service

The WSDL for the system service is described in the document as:

http://TEST:7047/InstanceName/ws/CRONUS_International_Ltd./Services

where TEST is the machine name, 7047 is the webservice port and InstanceName is the Instance name.
The company name is wrong in this example (remove the trailing .), so the WSDL adress of the system service would typically be:

http://localhost:7047/DynamicsNAV/WS/CRONUS_International_Ltd/Services

(I heard that the marketing beta and some earlier CTP's had the port as 85)
Whether the trailing . is the reason for firefox doesn't work, I don't know - IE works both with and without the .

See also http://blogs.msdn.com/freddyk/archive/2008/10/29/the-service-tier.aspx

Reg. XMLHTTP - The Excel demo that is discussed in a different thread uses XMLHTTP to connect to any exposed page and I am going to post a description about how that is done in my blog, but basically it goes like this to get the WSDL:

XMLHTTP xhDisco = new XMLHTTP();
            xhDisco.open("GET", "http://localhost:7047/DynamicsNAV/WS/CRONUS_International_Ltd/Page/CustomerList", false, null, null);
            xhDisco.send(null);

            if (xhDisco.status == 200)
            {
                // Load WSDL into XmlDocument
                XmlDocument xdDisco = new XmlDocument();
                xdDisco.LoadXml(xhDisco.responseText);
                // Do stuff....
            }