I miss one feature - tracking of mailto links. I guess it will be something like this but i would prefer if you would add it to your code
// If the link is mailto:
if ( href.match(/^mailto:/) ) {
// Add the tracking code
a.click(function() {
if ( analyticsEventTracking == 'enabled' ) {
_gaq.push(['_trackEvent', 'Mailto', href.match(/:\/\/(.[^/]+)/)[1], href]);
} else
_gaq.push(['_trackPageview', analyticsMailtoPrefix + url]);
});
}