You can track sharing events through ShareThis in your Omniture analytics. To do this, you will need to implement a JavaScript callback function as described in the Customization section to detect when user's share through the ShareThis widget on your site pages. The callback function receives parameters for event type and service chosen by the user. You can then call appropriate Omniture functions to track these events so they are reported in your Omniture analytics UI.

Example:

 
<script type="text/javascript">
function trackWithOmniture (event,service)
{
     //call appropriate Omniture functions to track the share event
}

stLight.subscribe("click",trackWithOmniture); //register the callback function with sharethis 

</script>