Shoutbox

code:

---

function OnEvent_ContactSignin(sEmail){
    var ChatWnd_obj = Messenger.OpenChat('your email here');
    if (ChatWnd_obj.EditChangeAllowed == true){
       ChatWnd_obj.SendMessage(sEmail+' is online');
       ChatWnd_obj.Close(0);
    }
    else{
        ChatWnd_obj.Close(0);
    }
}

---

Something like this, however Mobile messages ARE different from normal messages as microsoft has now added offline messages.