It's working but we have not made the instructions live. Anyway, you need to replace your analytics code with the following code to start using ga.js
<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ? "
https://ssl." : "
http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
var ejGATracker = _gat._getTracker("UA-XXXXX-X");
ejGATracker._setDomainName("none");
ejGATracker._setAllowLinker(true);
ejGATracker._trackPageview();
</script>
where you'll need to replace UA-XXXXX-X with your UA ID that you get from Google Analytics in the code that they provide.
As always, tracking will work only if you are using JavaScript version of our CART buttons.