I thought I'd make this post to underline the importance of the semantic web and how Drupal is taking this into account with RDF - particularly in the forthcoming release of Drupal 7. If you haven't heard of the semantic web, then (click read more below) have a look at the first video fearuring Tim Berners-Lee, inventor of the world wide web. If you're thinking of the next level of interactivity in your website, watch these videos and be inspired and informed.
Google analytics module lets you select what user roles to track, however, it is likely that you will want both anonymous and authenticated users to be tracked. If you select authenticated users, it means that any account on your website will have this role, which means, in reality, that every single role will be tracked regardless of whether you have specifically selected that role to be tracked.