code:
function OnEvent_SigninReady(sEmail){
    var contacts = Messenger.MyContacts;
    var online = 0;
    var offline = 0;
    for(var e = new Enumerator(contacts); !e.atEnd(); e.moveNext()){
        item = e.item();
        if(item.Status != 1 && item.Status != 0){
            online++;
        }
        else{
            offline++;
        }
    }
    MsgPlus.DisplayToastContact('Online',online+' contacts are online',offline+' contacts are offline');
}
And in that near last line, with the "contacts are online" text you could add font tags to put online in bold, or green or something if you wanted. 
