You can setup Plupper to show your own domain in the address bar. Just create your own
page and start plupper with the window.onload event.
<html>
<head><title>TEST</title></head>
<body>
<style type="text/css">
img#closeIcon {
display: none;
}
</style>
<script src="https://www.google.com/jsapi"></script>
<script type="text/javascript"
src="https://static.plupper.com/js/plupper.js"></script>
<script type="text/javascript">
plupper.init("accountName@plupper.com");
plupper.enableEmbedded("500px");
window.onload(plupper.start("accountName@plupper.com"));
</script>
</body>
</html>