WWF and Google Analytics

I was looking for the best way to insert the google analytics code on the forum and my conclusion was that the footer.asp is the best place. But while looking at it, I found a tip to use a code to insert the username on the stats as a custom variable, find it a great tip.

This is the code:

<script type="text/javascript">pageTracker._setVar("<%=strLoggedInUsername%>");</script>

Now I am trying to do more with my GA accont and see what else can be done. 

Who is doing something like that? Is there a way to use GA as a log system, seeing where the users are going and what they are doing?

Thanks

With this custom variable I can generate personalized reports and from them I can see the number of visits of a user, in a month, day or week, I can know the pages the user is seeing, and I can have the last visit and how long from the last visit from him to a determinated page. So far these were my tests, I know I can do a lot more and I believe that with time and tips from other users I can do more usefull stuff with GA.