keeping one instance of a dojo module
require([
     'some/module'
], function (module) {
    module.setSomeValue(3);
});

define([
    'some/module'
], function(module) {
    return {
        start: function() {
            var x = module.getSomeValue();
        }
    };
});

acompany = window.acompany || {};
acompany.project = acompany.project || {
};

require([
], function() {
    var debug = false;

    acompany.project.module = {
        /* static variables and functions here */
    };
});

define([

], function () {
    return acompany.project.module;
});

define([
    'dojo/_base/lang/',
    'some/module'
], function(lang, module) {

    var m = lang.getObject('some.module', true);
    m.x = 0;
    m.doSomething = function(){
      // doSomething
    };
    return m;
});

require([
    'some/module'
], function(someModule) {
    var debug = false;

    /* someModule - static variables and functions here */

    if(someModule.x == 0){

    }
});

define("some/module", {
    someValue: "some",
    otherValue: "other"
});

require(["some/module"], function(module) {
    console.log("module.someValue", module.someValue); // some
    module.someValue = "some changed";
});

require(["some/module"], function(module) {
    console.log("module.someValue", module.someValue); // some changed
});

define("some/stateful-module", ["dojo/Stateful"], function(Stateful){
    var stateful = new Stateful({
        someValue: "some",
        otherValue: "other"
    });
    return stateful;
});

require(["some/stateful-module"], function(module) {
    console.log("stateful-module.someValue:", module.get("someValue"));
    module.watch(function(name, oldValue, newValue) {
        console.log("stateful-module: property"
            , name
            , "changed from"
            , "'" + oldValue + "'"
            ,  "to"
            , "'" + newValue + "'"
        );
    });
});

require(["some/stateful-module"], function(module) {
    module.set("someValue", "some changed");
});​