How to asynchronously service multiple QBWC clients with Node.js

The idea is to implement a QBWC web service using Node.js which can serve multiple incoming requests in an asynchronous fashion. Currently I am looking into qbws which is a Node.js web service for QuickBooks Desktop Web Connector. Any ideas on how I can extend this to support an asynchronous architecture for the service methods?
Thanks in Advance!

The soap module supports asynchronous function calls which makes this easy to do. To use the same template as my other answer, here's how you'd do that:

var soap = require('soap');

var yourService = {
    QBWebConnectorSvc: {
        QBWebConnectorSvcSoap: {
            serverVersion: function (args, callback) {

                // serverVersion code here

                callback({
                    serverVersionResult: { string: retVal }
                });
            },
            clientVersion: function (args, callback) {

                //clientVersion code here

                callback({
                    clientVersionResult: { string: retVal }
                });
            },

            // and all other service functions required by QBWC

        }
    }
};

There are two differences:

1. Each method signature has an additional callback parameter
2. There is no return, that's handled by callback() instead.

I don't currently have a suitable environment to test this, but I created a client to imitate QuickBooks Web Connector and it worked fine. Converting the qbws methods to asynchronous allowed it to service multiple clients simultaneously (including one legitimate QBWC client).